@cvp You are right the path has changed. It looks like the path for external files is "/private/var/mobile/Containers/Data/Application/37E6A0DC-0618-4E14-9AD2-75E03BA90884/Documents/Mappe.xlsx"
The path of the Pythonista Files is Path='.../6ABBAC2F-5C86-4FDE-9028-6379CF4EE774/...'
That solved my problem. Thank you very much for your continued support.