Solved! The suggestion of Patryk_F, which has been taken from Anke, was of great help for me with the same problem, but it is still not working, bacause the first permission cannot be asked when initializing Screen1, but when clicking a button, and permission cannot be expressed with a text string, but from Screen1 menu. After hours of works, I finally found the solution in the image attached. The strange thing is that the app does not notify to ask permission from the user, but automatically gives permission to connect to Bluetooth.
My class was waiting for that ! I hope it will be useful also for you.
Some useful suggestions also here