My Android app runs for years on mobiles with Android 7 and 8. At the start all permissions are requested and granted. This works for years.
Since a few days (end May 2019) I get this error on different mobiles:
W/System.err: java.io.FileNotFoundException: /storage/emulated/0/WPE_log.txt (Permission denied). The same on /storage/emulated/0/Download/WPE/filenames.
All permissions were granted (a year) ago.
Have there been any recent changes that have effect on the permissions system?