I’ve been developing an app few weeks ago, i’ve sent it to users, they like it ! (Awesome !)
But yesterday they’ve reached to me that the app was unavailable, i’ve checked and the data sources dissapeared and i can’t set them back. As in the screenshot :
I suspect it might be related to the integration. Have you recently deleted a user or made a similar change?
Please open the application settings and go to the “Integration” tab. Check whether the integration has a user associated with it. If not, just edit it and save — it should automatically associate your current user.