MCP - Error while handling SSE connection

Technical Help
1

Are you using our SaaS platform (Baserow.io) or self-hosting Baserow?

Self-hosted

If you are self-hosting, what version of Baserow are you running?

Baserow version: 1.35.1

If you are self-hosting, which installation method do you use to run Baserow?

Docker IDK the exact version

What are the exact steps to reproduce this issue?

When i start Claude with Baserow MCP, I have mcp error in the docker console.
Baserow actions from Claude are not available. I can’t see them.

Attach screenshots, videos, or logs that demonstrate the issue.

Capture d’écran 2025-11-10 à 11.56.06.png
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Capture d’écran 2025-11-10 à 11.55.08.png
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Capture d’écran 2025-11-10 à 11.55.02.png
Capture d’écran 2025-11-10 à 11.55.02.png1666×1190 129 KB

2

Here is the first part of the error :

[BACKEND][2025-11-10 10:34:34] 195.101.82.105:0 - "POST /api/builder/workflow_action/91908/dispatch/ HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:35] 195.101.82.105:0 - "OPTIONS /api/builder/domains/published/data-source/41654/dispatch/ HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:35] 195.101.82.105:0 - "OPTIONS /api/builder/domains/published/data-source/41704/dispatch/?offset=0&count=20&search_query=UGECAM+COUBERT HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:35] 213.139.10.85:0 - "POST /mcp/messages/?session_id=fdfeb520325a4ef2b333fcf2db998dcc HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:35] 213.139.10.85:0 - "POST /mcp/messages/?session_id=fdfeb520325a4ef2b333fcf2db998dcc HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:35] 195.101.82.105:0 - "POST /api/builder/domains/published/data-source/41654/dispatch/ HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:35] 836|2025-11-10 10:34:35.560|ERROR|baserow.core.mcp:handle_sse:138 - Error while handling SSE connection  
 [BACKEND][2025-11-10 10:34:35] Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/anyio/streams/memory.py", line 111, in receive  
 [BACKEND][2025-11-10 10:34:35]     return self.receive_nowait()  
 [BACKEND][2025-11-10 10:34:35]            │    └ <function MemoryObjectReceiveStream.receive_nowait at 0x7fccb29100e0>  
 [BACKEND][2025-11-10 10:34:35]            └ MemoryObjectReceiveStream(_state=MemoryObjectStreamState(max_buffer_size=0, buffer=deque([]), open_send_channels=0, open_rece...  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/anyio/streams/memory.py", line 106, in receive_nowait  
 [BACKEND][2025-11-10 10:34:35]     raise WouldBlock  
 [BACKEND][2025-11-10 10:34:35]           └ <class 'anyio.WouldBlock'>  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35] anyio.WouldBlock  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35] During handling of the above exception, another exception occurred:  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35] Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/mcp/server/lowlevel/server.py", line 489, in run  
 [BACKEND][2025-11-10 10:34:35]     async with anyio.create_task_group() as tg:  
 [BACKEND][2025-11-10 10:34:35]                │     │                      └ <anyio._backends._asyncio.TaskGroup object at 0x7fcca366aa90>  
 [BACKEND][2025-11-10 10:34:35]                │     └ <function create_task_group at 0x7fccb2a813a0>  
 [BACKEND][2025-11-10 10:34:35]                └ <module 'anyio' from '/baserow/venv/lib/python3.11/site-packages/anyio/__init__.py'>  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 771, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]     raise exc_val  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/mcp/server/lowlevel/server.py", line 490, in run  
 [BACKEND][2025-11-10 10:34:35]     async for message in session.incoming_messages:  
 [BACKEND][2025-11-10 10:34:35]                          │       └ <property object at 0x7fccae06f9c0>  
 [BACKEND][2025-11-10 10:34:35]                          └ <mcp.server.session.ServerSession object at 0x7fcca366a450>  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/anyio/abc/_streams.py", line 35, in __anext__  
 [BACKEND][2025-11-10 10:34:35]     return await self.receive()  
 [BACKEND][2025-11-10 10:34:35]                  │    └ <function MemoryObjectReceiveStream.receive at 0x7fccb2910180>  
 [BACKEND][2025-11-10 10:34:35]                  └ MemoryObjectReceiveStream(_state=MemoryObjectStreamState(max_buffer_size=0, buffer=deque([]), open_send_channels=0, open_rece...  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/anyio/streams/memory.py", line 119, in receive  
 [BACKEND][2025-11-10 10:34:35]     await receive_event.wait()  
 [BACKEND][2025-11-10 10:34:35]           │             └ <function Event.wait at 0x7fcca079dda0>  
 [BACKEND][2025-11-10 10:34:35]           └ <anyio._backends._asyncio.Event object at 0x7fcca366af10>  
 [BACKEND][2025-11-10 10:34:35]   File "/usr/lib/python3.11/asyncio/locks.py", line 213, in wait  
 [BACKEND][2025-11-10 10:34:35]     await fut  
 [BACKEND][2025-11-10 10:34:35]           └ <Future cancelled>  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35] asyncio.exceptions.CancelledError: Cancelled by cancel scope 7fcca366a850  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35] During handling of the above exception, another exception occurred:  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   + Exception Group Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/backend/src/baserow/core/mcp/sse.py", line 147, in connect_sse  
 [BACKEND][2025-11-10 10:34:35]   |     yield (read_stream, write_stream)  
 [BACKEND][2025-11-10 10:34:35]   |            │            └ MemoryObjectSendStream(_state=MemoryObjectStreamState(max_buffer_size=0, buffer=deque([]), open_send_channels=0, open_receive...  
 [BACKEND][2025-11-10 10:34:35]   |            └ MemoryObjectReceiveStream(_state=MemoryObjectStreamState(max_buffer_size=0, buffer=deque([]), open_send_channels=1, open_rece...  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/backend/src/baserow/core/mcp/__init__.py", line 123, in handle_sse  
 [BACKEND][2025-11-10 10:34:35]   |     await self._mcp_server.run(  
 [BACKEND][2025-11-10 10:34:35]   |           │    │           └ <function Server.run at 0x7fccae05b7e0>  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <mcp.server.lowlevel.server.Server object at 0x7fccaf0f7a10>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <baserow.core.mcp.BaserowMCPServer object at 0x7fccaf0f7950>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/mcp/server/lowlevel/server.py", line 483, in run  
 [BACKEND][2025-11-10 10:34:35]   |     async with AsyncExitStack() as stack:  
 [BACKEND][2025-11-10 10:34:35]   |                │                   └ <contextlib.AsyncExitStack object at 0x7fcca20c1fd0>  
 [BACKEND][2025-11-10 10:34:35]   |                └ <class 'contextlib.AsyncExitStack'>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/usr/lib/python3.11/contextlib.py", line 733, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]   |     raise exc_details[1]  
 [BACKEND][2025-11-10 10:34:35]   |           └ (<class 'ExceptionGroup'>, ExceptionGroup('unhandled errors in a TaskGroup', [RuntimeError('Received request before initializ...  
 [BACKEND][2025-11-10 10:34:35]   |   File "/usr/lib/python3.11/contextlib.py", line 716, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]   |     cb_suppress = await cb(*exc_details)  
 [BACKEND][2025-11-10 10:34:35]   |                         │   └ (<class 'ExceptionGroup'>, ExceptionGroup('unhandled errors in a TaskGroup', [RuntimeError('Received request before initializ...  
 [BACKEND][2025-11-10 10:34:35]   |                         └ <bound method _AsyncGeneratorContextManager.__aexit__ of <contextlib._AsyncGeneratorContextManager object at 0x7fcc9b2a0890>>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/mcp/shared/session.py", line 210, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]   |     return await self._task_group.__aexit__(exc_type, exc_val, exc_tb)  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │           │         │         │        └ <traceback object at 0x7fcca3669b00>  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │           │         │         └ CancelledError('Cancelled by cancel scope 7fcca366a850')  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │           │         └ <class 'asyncio.exceptions.CancelledError'>  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │           └ <function TaskGroup.__aexit__ at 0x7fcca2f0a660>  
 [BACKEND][2025-11-10 10:34:35]   |                  │    └ <anyio._backends._asyncio.TaskGroup object at 0x7fcca3668e90>  
 [BACKEND][2025-11-10 10:34:35]   |                  └ <mcp.server.session.ServerSession object at 0x7fcca366a450>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 767, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]   |     raise BaseExceptionGroup(  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)  
 [BACKEND][2025-11-10 10:34:35]   +-+---------------- 1 ----------------  
 [BACKEND][2025-11-10 10:34:35]     | Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]     |  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/venv/lib/python3.11/site-packages/mcp/shared/session.py", line 324, in _receive_loop  
 [BACKEND][2025-11-10 10:34:35]     |     await self._received_request(responder)  
 [BACKEND][2025-11-10 10:34:35]     |           │    │                 └ <mcp.shared.session.RequestResponder object at 0x7fcc88f24490>  
 [BACKEND][2025-11-10 10:34:35]     |           │    └ <function ServerSession._received_request at 0x7fccae059120>  
 [BACKEND][2025-11-10 10:34:35]     |           └ <mcp.server.session.ServerSession object at 0x7fcca366a450>  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/venv/lib/python3.11/site-packages/mcp/server/session.py", line 163, in _received_request  
 [BACKEND][2025-11-10 10:34:35]     |     raise RuntimeError(  
 [BACKEND][2025-11-10 10:34:35]     |  
 [BACKEND][2025-11-10 10:34:35]     | RuntimeError: Received request before initialization was complete  
 [BACKEND][2025-11-10 10:34:35]     +------------------------------------
3

The second part:

 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35] During handling of the above exception, another exception occurred:  
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   
 [BACKEND][2025-11-10 10:34:35]   + Exception Group Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/bin/gunicorn", line 7, in <module>  
 [BACKEND][2025-11-10 10:34:35]   |     sys.exit(run())  
 [BACKEND][2025-11-10 10:34:35]   |     │   │    └ <function run at 0x7fccb3ab85e0>  
 [BACKEND][2025-11-10 10:34:35]   |     │   └ <built-in function exit>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <module 'sys' (built-in)>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 66, in run  
 [BACKEND][2025-11-10 10:34:35]   |     WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]", prog=prog).run()  
 [BACKEND][2025-11-10 10:34:35]   |     │                                                       └ None  
 [BACKEND][2025-11-10 10:34:35]   |     └ <class 'gunicorn.app.wsgiapp.WSGIApplication'>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/app/base.py", line 235, in run  
 [BACKEND][2025-11-10 10:34:35]   |     super().run()  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/app/base.py", line 71, in run  
 [BACKEND][2025-11-10 10:34:35]   |     Arbiter(self).run()  
 [BACKEND][2025-11-10 10:34:35]   |     │       └ <gunicorn.app.wsgiapp.WSGIApplication object at 0x7fccb390e490>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <class 'gunicorn.arbiter.Arbiter'>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/arbiter.py", line 201, in run  
 [BACKEND][2025-11-10 10:34:35]   |     self.manage_workers()  
 [BACKEND][2025-11-10 10:34:35]   |     │    └ <function Arbiter.manage_workers at 0x7fccb340fba0>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <gunicorn.arbiter.Arbiter object at 0x7fccb34e7610>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/arbiter.py", line 570, in manage_workers  
 [BACKEND][2025-11-10 10:34:35]   |     self.spawn_workers()  
 [BACKEND][2025-11-10 10:34:35]   |     │    └ <function Arbiter.spawn_workers at 0x7fccb340fce0>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <gunicorn.arbiter.Arbiter object at 0x7fccb34e7610>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/arbiter.py", line 641, in spawn_workers  
 [BACKEND][2025-11-10 10:34:35]   |     self.spawn_worker()  
 [BACKEND][2025-11-10 10:34:35]   |     │    └ <function Arbiter.spawn_worker at 0x7fccb340fc40>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <gunicorn.arbiter.Arbiter object at 0x7fccb34e7610>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/arbiter.py", line 608, in spawn_worker  
 [BACKEND][2025-11-10 10:34:35]   |     worker.init_process()  
 [BACKEND][2025-11-10 10:34:35]   |     │      └ <function UvicornWorker.init_process at 0x7fccb2b7d3a0>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <uvicorn.workers.UvicornWorker object at 0x7fccb293e110>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/workers.py", line 75, in init_process  
 [BACKEND][2025-11-10 10:34:35]   |     super().init_process()  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/gunicorn/workers/base.py", line 143, in init_process  
 [BACKEND][2025-11-10 10:34:35]   |     self.run()  
 [BACKEND][2025-11-10 10:34:35]   |     │    └ <function UvicornWorker.run at 0x7fccb293af20>  
 [BACKEND][2025-11-10 10:34:35]   |     └ <uvicorn.workers.UvicornWorker object at 0x7fccb293e110>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/workers.py", line 107, in run  
 [BACKEND][2025-11-10 10:34:35]   |     return asyncio.run(self._serve())  
 [BACKEND][2025-11-10 10:34:35]   |            │       │   │    └ <function UvicornWorker._serve at 0x7fccb293ae80>  
 [BACKEND][2025-11-10 10:34:35]   |            │       │   └ <uvicorn.workers.UvicornWorker object at 0x7fccb293e110>  
 [BACKEND][2025-11-10 10:34:35]   |            │       └ <function run at 0x7fccb2bfbe20>  
 [BACKEND][2025-11-10 10:34:35]   |            └ <module 'asyncio' from '/usr/lib/python3.11/asyncio/__init__.py'>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/usr/lib/python3.11/asyncio/runners.py", line 190, in run  
 [BACKEND][2025-11-10 10:34:35]   |     return runner.run(main)  
 [BACKEND][2025-11-10 10:34:35]   |            │      │   └ <coroutine object UvicornWorker._serve at 0x7fccadbd6740>  
 [BACKEND][2025-11-10 10:34:35]   |            │      └ <function Runner.run at 0x7fccb2c2cf40>  
 [BACKEND][2025-11-10 10:34:35]   |            └ <asyncio.runners.Runner object at 0x7fcca98129d0>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/usr/lib/python3.11/asyncio/runners.py", line 118, in run  
 [BACKEND][2025-11-10 10:34:35]   |     return self._loop.run_until_complete(task)  
 [BACKEND][2025-11-10 10:34:35]   |            │    │     │                  └ <Task pending name='Task-1' coro=<UvicornWorker._serve() running at /baserow/venv/lib/python3.11/site-packages/uvicorn/worker...  
 [BACKEND][2025-11-10 10:34:35]   |            │    │     └ <cyfunction Loop.run_until_complete at 0x7fccb2972330>  
 [BACKEND][2025-11-10 10:34:35]   |            │    └ <uvloop.Loop running=True closed=False debug=False>  
 [BACKEND][2025-11-10 10:34:35]   |            └ <asyncio.runners.Runner object at 0x7fcca98129d0>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/protocols/http/httptools_impl.py", line 409, in run_asgi  
 [BACKEND][2025-11-10 10:34:35]   |     result = await app(  # type: ignore[func-returns-value]  
 [BACKEND][2025-11-10 10:34:35]   |                    └ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x7fcca92357d0>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     return await self.app(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │   │      │        └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9e58...  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │   │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |                  │    │   └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |                  │    └ <channels.routing.ProtocolTypeRouter object at 0x7fcca8f5c190>  
 [BACKEND][2025-11-10 10:34:35]   |                  └ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x7fcca92357d0>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/channels/routing.py", line 62, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     return await application(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |                  │           │      │        └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9e58...  
 [BACKEND][2025-11-10 10:34:35]   |                  │           │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |                  │           └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |                  └ <baserow.config.helpers.ConcurrencyLimiterASGI object at 0x7fcca97befd0>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/backend/src/baserow/config/helpers.py", line 31, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     await self.app(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      │        └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9e58...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <channels.routing.URLRouter object at 0x7fcca8f99210>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <baserow.config.helpers.ConcurrencyLimiterASGI object at 0x7fcca97befd0>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/channels/routing.py", line 116, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     return await application(  
 [BACKEND][2025-11-10 10:34:35]   |                  └ <starlette.applications.Starlette object at 0x7fcca8f7d890>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/applications.py", line 112, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     await self.middleware_stack(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │    │                │      │        └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9e58...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │                │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │                └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <starlette.middleware.errors.ServerErrorMiddleware object at 0x7fcca1ccb810>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <starlette.applications.Starlette object at 0x7fcca8f7d890>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/middleware/errors.py", line 165, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     await self.app(scope, receive, _send)  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      │        └ <function ServerErrorMiddleware.__call__.<locals>._send at 0x7fcc9b7b9440>  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <starlette.middleware.exceptions.ExceptionMiddleware object at 0x7fcca172e810>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <starlette.middleware.errors.ServerErrorMiddleware object at 0x7fcca1ccb810>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 62, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │    │     │      │        └ <function ServerErrorMiddleware.__call__.<locals>._send at 0x7fcc9b7b9440>  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │    │     │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │    │     └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │    └ <starlette.requests.Request object at 0x7fcca20c3d10>  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    └ <starlette.routing.Router object at 0x7fcca8f7e490>  
 [BACKEND][2025-11-10 10:34:35]   |           │                            └ <starlette.middleware.exceptions.ExceptionMiddleware object at 0x7fcca172e810>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <function wrap_app_handling_exceptions at 0x7fccae1a2020>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app  
 [BACKEND][2025-11-10 10:34:35]   |     await app(scope, receive, sender)  
 [BACKEND][2025-11-10 10:34:35]   |           │   │      │        └ <function wrap_app_handling_exceptions.<locals>.wrapped_app.<locals>.sender at 0x7fcc9bc0af20>  
 [BACKEND][2025-11-10 10:34:35]   |           │   │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │   └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           └ <starlette.routing.Router object at 0x7fcca8f7e490>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 714, in __call__  
 [BACKEND][2025-11-10 10:34:35]   |     await self.middleware_stack(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │    │                │      │        └ <function wrap_app_handling_exceptions.<locals>.wrapped_app.<locals>.sender at 0x7fcc9bc0af20>  
 [BACKEND][2025-11-10 10:34:35]   |           │    │                │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │                └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <bound method Router.app of <starlette.routing.Router object at 0x7fcca8f7e490>>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <starlette.routing.Router object at 0x7fcca8f7e490>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 734, in app  
 [BACKEND][2025-11-10 10:34:35]   |     await route.handle(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │     │      │      │        └ <function wrap_app_handling_exceptions.<locals>.wrapped_app.<locals>.sender at 0x7fcc9bc0af20>  
 [BACKEND][2025-11-10 10:34:35]   |           │     │      │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │     │      └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │     └ <function Route.handle at 0x7fccae1d0720>  
 [BACKEND][2025-11-10 10:34:35]   |           └ Route(path='/mcp/{key}/sse', name='handle_sse', methods=['GET', 'HEAD'])  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 288, in handle  
 [BACKEND][2025-11-10 10:34:35]   |     await self.app(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      │        └ <function wrap_app_handling_exceptions.<locals>.wrapped_app.<locals>.sender at 0x7fcc9bc0af20>  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <function request_response.<locals>.app at 0x7fcca8e74400>  
 [BACKEND][2025-11-10 10:34:35]   |           └ Route(path='/mcp/{key}/sse', name='handle_sse', methods=['GET', 'HEAD'])  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 76, in app  
 [BACKEND][2025-11-10 10:34:35]   |     await wrap_app_handling_exceptions(app, request)(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │        │      │        └ <function wrap_app_handling_exceptions.<locals>.wrapped_app.<locals>.sender at 0x7fcc9bc0af20>  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │        │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    │        └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           │                            │    └ <starlette.requests.Request object at 0x7fcc9b61a1d0>  
 [BACKEND][2025-11-10 10:34:35]   |           │                            └ <function request_response.<locals>.app.<locals>.app at 0x7fcc9bc0bba0>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <function wrap_app_handling_exceptions at 0x7fccae1a2020>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app  
 [BACKEND][2025-11-10 10:34:35]   |     await app(scope, receive, sender)  
 [BACKEND][2025-11-10 10:34:35]   |           │   │      │        └ <function wrap_app_handling_exceptions.<locals>.wrapped_app.<locals>.sender at 0x7fcc9bc0b420>  
 [BACKEND][2025-11-10 10:34:35]   |           │   │      └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.httptools_impl.RequestResponseCycle object at 0x7fcc9b9...  
 [BACKEND][2025-11-10 10:34:35]   |           │   └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'server': ('127.0.0.1', 8000), 'cl...  
 [BACKEND][2025-11-10 10:34:35]   |           └ <function request_response.<locals>.app.<locals>.app at 0x7fcc9bc0bba0>  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 73, in app  
 [BACKEND][2025-11-10 10:34:35]   |     response = await f(request)  
 [BACKEND][2025-11-10 10:34:35]   |                      │ └ <starlette.requests.Request object at 0x7fcc9b61a1d0>  
 [BACKEND][2025-11-10 10:34:35]   |                      └ <function BaserowMCPServer.sse_app.<locals>.handle_sse at 0x7fcca905dda0>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   | > File "/baserow/backend/src/baserow/core/mcp/__init__.py", line 118, in handle_sse  
 [BACKEND][2025-11-10 10:34:35]   |     async with sse.connect_sse(  
 [BACKEND][2025-11-10 10:34:35]   |                │   └ <function DjangoChannelsSseServerTransport.connect_sse at 0x7fccae08f920>  
 [BACKEND][2025-11-10 10:34:35]   |                └ <baserow.core.mcp.sse.DjangoChannelsSseServerTransport object at 0x7fcca92a1110>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/usr/lib/python3.11/contextlib.py", line 222, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]   |     await self.gen.athrow(typ, value, traceback)  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      │    │      └ <traceback object at 0x7fcca369e140>  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      │    └ ExceptionGroup('unhandled errors in a TaskGroup', [RuntimeError('Received request before initialization was complete')])  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   │      └ <class 'ExceptionGroup'>  
 [BACKEND][2025-11-10 10:34:35]   |           │    │   └ <method 'athrow' of 'async_generator' objects>  
 [BACKEND][2025-11-10 10:34:35]   |           │    └ <async_generator object DjangoChannelsSseServerTransport.connect_sse at 0x7fcca3fe1fc0>  
 [BACKEND][2025-11-10 10:34:35]   |           └ <contextlib._AsyncGeneratorContextManager object at 0x7fcca1f8cf50>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/backend/src/baserow/core/mcp/sse.py", line 138, in connect_sse  
 [BACKEND][2025-11-10 10:34:35]   |     async with anyio.create_task_group() as tg:  
 [BACKEND][2025-11-10 10:34:35]   |                │     │                      └ <anyio._backends._asyncio.TaskGroup object at 0x7fcc9b61a490>  
 [BACKEND][2025-11-10 10:34:35]   |                │     └ <function create_task_group at 0x7fccb2a813a0>  
 [BACKEND][2025-11-10 10:34:35]   |                └ <module 'anyio' from '/baserow/venv/lib/python3.11/site-packages/anyio/__init__.py'>  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   |   File "/baserow/venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 767, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]   |     raise BaseExceptionGroup(  
 [BACKEND][2025-11-10 10:34:35]   |  
 [BACKEND][2025-11-10 10:34:35]   | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)  
 [BACKEND][2025-11-10 10:34:35]   +-+---------------- 1 ----------------  
 [BACKEND][2025-11-10 10:34:35]     | Exception Group Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]     |  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/backend/src/baserow/core/mcp/sse.py", line 147, in connect_sse  
 [BACKEND][2025-11-10 10:34:35]     |     yield (read_stream, write_stream)  
 [BACKEND][2025-11-10 10:34:35]     |            │            └ MemoryObjectSendStream(_state=MemoryObjectStreamState(max_buffer_size=0, buffer=deque([]), open_send_channels=0, open_receive...  
 [BACKEND][2025-11-10 10:34:35]     |            └ MemoryObjectReceiveStream(_state=MemoryObjectStreamState(max_buffer_size=0, buffer=deque([]), open_send_channels=1, open_rece...  
 [BACKEND][2025-11-10 10:34:35]     |  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/backend/src/baserow/core/mcp/__init__.py", line 123, in handle_sse  
 [BACKEND][2025-11-10 10:34:35]     |     await self._mcp_server.run(  
 [BACKEND][2025-11-10 10:34:35]     |           │    │           └ <function Server.run at 0x7fccae05b7e0>  
 [BACKEND][2025-11-10 10:34:35]     |           │    └ <mcp.server.lowlevel.server.Server object at 0x7fccaf0f7a10>  
 [BACKEND][2025-11-10 10:34:35]     |           └ <baserow.core.mcp.BaserowMCPServer object at 0x7fccaf0f7950>  
 [BACKEND][2025-11-10 10:34:35]     |  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/venv/lib/python3.11/site-packages/mcp/server/lowlevel/server.py", line 483, in run  
 [BACKEND][2025-11-10 10:34:35]     |     async with AsyncExitStack() as stack:  
 [BACKEND][2025-11-10 10:34:35]     |                │                   └ <contextlib.AsyncExitStack object at 0x7fcca20c1fd0>  
 [BACKEND][2025-11-10 10:34:35]     |                └ <class 'contextlib.AsyncExitStack'>  
 [BACKEND][2025-11-10 10:34:35]     |   File "/usr/lib/python3.11/contextlib.py", line 733, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]     |     raise exc_details[1]  
 [BACKEND][2025-11-10 10:34:35]     |           └ (<class 'ExceptionGroup'>, ExceptionGroup('unhandled errors in a TaskGroup', [RuntimeError('Received request before initializ...  
 [BACKEND][2025-11-10 10:34:35]     |   File "/usr/lib/python3.11/contextlib.py", line 716, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]     |     cb_suppress = await cb(*exc_details)  
 [BACKEND][2025-11-10 10:34:35]     |                         │   └ (<class 'ExceptionGroup'>, ExceptionGroup('unhandled errors in a TaskGroup', [RuntimeError('Received request before initializ...  
 [BACKEND][2025-11-10 10:34:35]     |                         └ <bound method _AsyncGeneratorContextManager.__aexit__ of <contextlib._AsyncGeneratorContextManager object at 0x7fcc9b2a0890>>  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/venv/lib/python3.11/site-packages/mcp/shared/session.py", line 210, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]     |     return await self._task_group.__aexit__(exc_type, exc_val, exc_tb)  
 [BACKEND][2025-11-10 10:34:35]     |                  │    │           │         │         │        └ <traceback object at 0x7fcca3669b00>  
 [BACKEND][2025-11-10 10:34:35]     |                  │    │           │         │         └ CancelledError('Cancelled by cancel scope 7fcca366a850')  
 [BACKEND][2025-11-10 10:34:35]     |                  │    │           │         └ <class 'asyncio.exceptions.CancelledError'>  
 [BACKEND][2025-11-10 10:34:35]     |                  │    │           └ <function TaskGroup.__aexit__ at 0x7fcca2f0a660>  
 [BACKEND][2025-11-10 10:34:35]     |                  │    └ <anyio._backends._asyncio.TaskGroup object at 0x7fcca3668e90>  
 [BACKEND][2025-11-10 10:34:35]     |                  └ <mcp.server.session.ServerSession object at 0x7fcca366a450>  
 [BACKEND][2025-11-10 10:34:35]     |   File "/baserow/venv/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 767, in __aexit__  
 [BACKEND][2025-11-10 10:34:35]     |     raise BaseExceptionGroup(  
 [BACKEND][2025-11-10 10:34:35]     |  
 [BACKEND][2025-11-10 10:34:35]     | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)  
 [BACKEND][2025-11-10 10:34:35]     +-+---------------- 1 ----------------  
 [BACKEND][2025-11-10 10:34:35]       | Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]       |  
 [BACKEND][2025-11-10 10:34:35]       |   File "/baserow/venv/lib/python3.11/site-packages/mcp/shared/session.py", line 324, in _receive_loop  
 [BACKEND][2025-11-10 10:34:35]       |     await self._received_request(responder)  
 [BACKEND][2025-11-10 10:34:35]       |           │    │                 └ <mcp.shared.session.RequestResponder object at 0x7fcc88f24490>  
 [BACKEND][2025-11-10 10:34:35]       |           │    └ <function ServerSession._received_request at 0x7fccae059120>  
 [BACKEND][2025-11-10 10:34:35]       |           └ <mcp.server.session.ServerSession object at 0x7fcca366a450>  
 [BACKEND][2025-11-10 10:34:35]       |   File "/baserow/venv/lib/python3.11/site-packages/mcp/server/session.py", line 163, in _received_request  
 [BACKEND][2025-11-10 10:34:35]       |     raise RuntimeError(  
 [BACKEND][2025-11-10 10:34:35]       |  
 [BACKEND][2025-11-10 10:34:35]       | RuntimeError: Received request before initialization was complete  
 [BACKEND][2025-11-10 10:34:35]       +------------------------------------
4

The last part:

 [BACKEND][2025-11-10 10:34:35] [2025-11-10 10:34:35 +0000] [836] [ERROR] Exception in ASGI application  
 [BACKEND][2025-11-10 10:34:35] Traceback (most recent call last):  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/protocols/http/httptools_impl.py", line 409, in run_asgi  
 [BACKEND][2025-11-10 10:34:35]     result = await app(  # type: ignore[func-returns-value]  
 [BACKEND][2025-11-10 10:34:35]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__  
 [BACKEND][2025-11-10 10:34:35]     return await self.app(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/channels/routing.py", line 62, in __call__  
 [BACKEND][2025-11-10 10:34:35]     return await application(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/backend/src/baserow/config/helpers.py", line 31, in __call__  
 [BACKEND][2025-11-10 10:34:35]     await self.app(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/channels/routing.py", line 116, in __call__  
 [BACKEND][2025-11-10 10:34:35]     return await application(  
 [BACKEND][2025-11-10 10:34:35]            ^^^^^^^^^^^^^^^^^^  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/applications.py", line 112, in __call__  
 [BACKEND][2025-11-10 10:34:35]     await self.middleware_stack(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/middleware/errors.py", line 187, in __call__  
 [BACKEND][2025-11-10 10:34:35]     raise exc  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/middleware/errors.py", line 165, in __call__  
 [BACKEND][2025-11-10 10:34:35]     await self.app(scope, receive, _send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 62, in __call__  
 [BACKEND][2025-11-10 10:34:35]     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app  
 [BACKEND][2025-11-10 10:34:35]     raise exc  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app  
 [BACKEND][2025-11-10 10:34:35]     await app(scope, receive, sender)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 714, in __call__  
 [BACKEND][2025-11-10 10:34:35]     await self.middleware_stack(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 734, in app  
 [BACKEND][2025-11-10 10:34:35]     await route.handle(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 288, in handle  
 [BACKEND][2025-11-10 10:34:35]     await self.app(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 76, in app  
 [BACKEND][2025-11-10 10:34:35]     await wrap_app_handling_exceptions(app, request)(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app  
 [BACKEND][2025-11-10 10:34:35]     raise exc  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app  
 [BACKEND][2025-11-10 10:34:35]     await app(scope, receive, sender)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/routing.py", line 74, in app  
 [BACKEND][2025-11-10 10:34:35]     await response(scope, receive, send)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/responses.py", line 150, in __call__  
 [BACKEND][2025-11-10 10:34:35]     await send(  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 39, in sender  
 [BACKEND][2025-11-10 10:34:35]     await send(message)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/_exception_handler.py", line 39, in sender  
 [BACKEND][2025-11-10 10:34:35]     await send(message)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/starlette/middleware/errors.py", line 162, in _send  
 [BACKEND][2025-11-10 10:34:35]     await send(message)  
 [BACKEND][2025-11-10 10:34:35]   File "/baserow/venv/lib/python3.11/site-packages/uvicorn/protocols/http/httptools_impl.py", line 554, in send  
 [BACKEND][2025-11-10 10:34:35]     raise RuntimeError(msg % message_type)  
 [BACKEND][2025-11-10 10:34:35] RuntimeError: Unexpected ASGI message 'http.response.start' sent, after response already completed.  
 [BACKEND][2025-11-10 10:34:37] 195.101.82.105:0 - "POST /api/builder/domains/published/data-source/41704/dispatch/?offset=0&count=20&search_query=UGECAM+COUBERT HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:37] 213.139.10.85:0 - "POST /mcp/messages/?session_id=fdfeb520325a4ef2b333fcf2db998dcc HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:37] 213.139.10.85:0 - "POST /mcp/messages/?session_id=fdfeb520325a4ef2b333fcf2db998dcc HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:39] 213.139.10.85:0 - "POST /mcp/messages/?session_id=fdfeb520325a4ef2b333fcf2db998dcc HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:40] 213.139.10.85:0 - "GET /mcp/xxx/sse HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:40] 213.139.10.85:0 - "POST /mcp/messages/?session_id=2de7d8c5e4c04e89b7643a4a1a22abd0 HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:40] 213.139.10.85:0 - "POST /mcp/messages/?session_id=2de7d8c5e4c04e89b7643a4a1a22abd0 HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:40] 213.139.10.85:0 - "POST /mcp/messages/?session_id=2de7d8c5e4c04e89b7643a4a1a22abd0 HTTP/1.1" 202  
 [BACKEND][2025-11-10 10:34:41] 127.0.0.1:52894 - "GET /api/_health/ HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:41] 195.101.82.105:0 - "OPTIONS /api/builder/workflow_action/91914/dispatch/ HTTP/1.1" 200  
 [BACKEND][2025-11-10 10:34:41] 195.101.82.105:0 - "OPTIONS /api/builder/domains/published/data-source/41704/dispatch/?offset=0&count=20&search_query=UGECAM+ HTTP/1.1" 200

The full log file is available here.

Does anyone know why I have this error and how I can fix it ?

Thank you,

5

Does anyone already experienced something similar ?