No real idea. But perhaps you can uninstall all from the ppa source and install nextcloud-desktop (version 3.4.2) from Ubuntu 22.04 LTS.
Ubuntu – Details of package nextcloud-desktop in jammy
Also you can change to Debian Testing (Bockworm) Desktop. There you get acutally also Nextcloud Client 3.4.2 (https://packages.debian.org/bookworm/nextcloud-desktop).
Also you can:
Download here: https://nextcloud.com/de/install/#install-clients
and read (sorry not tested)
https://wiki.ubuntuusers.de/AppImage