User is not logged in with iCloud

[integdigital]

What exactly is meant by that? I cant save files.

[Tutorialwork]

That means that the user needs to be signed in into his Apple ID in the settings of the iOS device. If this is not the case you can't use CloudKit.

[integdigital]

I am testing this package with my personal IPhone in TestFlight. I am logged into Apple ID and have enabled iCloud. Unfortunately it still shows „User is not logged in“

[Tutorialwork]

Are you sure that you enabled the iCloud Capability in Xcode?

[integdigital]

Yes, iCloud is enabled in Xcode and in the Apple Certificate.

[Tutorialwork]

Did you try to test your app in production on your iPhone? Because it makes a difference.