Android App Failing - Solved, sort-of

Since latest upgrade to Nextcloud app for Android, from Playstore, files have disappeared, see non-sotp, spinning progress wheel. Deleting data, re-install does not fix. Happens on Google Pixel 3xl as well as Samsung Table. Happens on older version 13.x, 14.x, and 15…0.4 after sequential upgrades.

Update: un-install of Google Play version after delete of data, and re-install from F-Droid “solved” the problem. Files re-appeared and sync properly. Of course that didn’t fix the Playstore version. AND, finger-print authentication disappeared: no authentication required to access files.

Sadly, I don’t see response to my posts. Am I in an alternative universe?