I am having problems with the File component method AppendToFile recently in both the Companion (ver 2.65). I have added the screen method ErrorOccurred with a Notifier to display the message.
The filename for the method is /Download/Data2210231600.csv.
From the compiled app the results are as follows.
With Shared scope the error is
Cannot write to file /storage/emulated/0
With Legacy scope the error is
Cannot write to file /Data/user/0/appinventor.ai_iainboyle314.BTServer/files
In the companion similar messages are given.
There is no mention of the directory or file name.
Up until yesterday I was having no problems with Android 9 only with Android 13.