I have created a multi-screen app. (1st screen: “clients gallery”, 2nd screen: “consultations gallery”, 3rd screen: “new consultation form”) Everything works well when I use the application in PowerApps designer interface.
After saving the application and opening the standalone app with the same user, I get the "no data source provided" error message when I navigate to the new form screen (3rd screen).
It seems that the page can't load because the back arrow, the date & time are missing from the header.
After clearing cache and a page refresh(ctrl+F5), the same "+" button - which would navigate to the 3rd screen - does not work anymore. Going back to the designer interface, the “+” works there.
The "+" button on select property is: Navigate(NewConsultation_screen,None). On the 3rd screen, the form default mode is “new”. The data sources are OK. I have also tried to copy the 3rd screen, delete the old version (of the 3rd screen) and rename the copy to match the original screen name.