Why when I launch a preview I see nothing

why when I launch a preview I see nothing can someone explain to me ?

what do you mean by nothing: elements are not loading or no data is displayed in repeating group? if later - check privacy rules at first.

the first sreen is my friend’s and the second is mine, so I copied and pasted it.


in a different app?

Yes, I make the same work


Do you have any data in your DB? Have you checked privacy rules?

yes i have access to this database i have the same one, check which privacy protection rules apply