i have my oneplusx running on lineage 17.1, without gapps, Android nextcloud clients from Fdroid all crash when logging in with correct credentials, else it is just showing loginpage again. Iā am using it in my local network only.
Nextcloud server is a new install version 13, access by desktop and bb10 (owncloud) works perfect. Access by owncloud client also works on my opx.