I'm currently developing my app and I don't why all my screen desappeard.
Object tree is still working, i can add modification but I'm not able to see any thing.
My App ID : 9749614a-14f3-408a-9498-8fab051eb143
I added a screen shot
Thanks you for your answer.
I have many galleries in my app.
All of their data source are from collections made in OnStart or OnVisible (from the first screen) events.
Also my data sources are created from Dynamics 365 connector.
I added some screenshots.
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