I’ve been trying to reinstall or update the neon-desktop package, but no matter what I’ve been stuck on the error below. I’m having to use GNOME right now and it sucks.
kf6-kfilemetadata : Depends: libpoppler-qt6-3t64 (>= 24.08.0) but 24.02.0-1ubuntu9.8 is to be installed
It looks like your neon-desktop install is failing because kf6-kfilemetadata requires a newer version of libpoppler-qt6-3t64 than what’s available in your current Ubuntu repos. Essentially, the package dependencies don’t match, so APT can’t complete the install. You have a few options: you could try upgrading your system to a version that provides libpoppler-qt6-3t64 ≥ 24.08, or add the KDE Neon repos temporarily to get the updated packages. Another approach is to download the required .deb manually from Neon’s repo and install it with dpkg -i, though you’ll have to handle dependencies yourself. Make sure to back up before forcing any installs, since mismatched versions can break other apps.
Look here for more info.