Something must have gone wrong during a recent update.
VLC was not starting when trying to launch from whisker menu. So I tried to start it from the terminal and got this output:
VLC media player 3.0.16 Vetinari (revision 3.0.13-8-g41878ff4f2) [000055dc57038630] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. Cannot mix incompatible Qt library (5.15.2) with this library (5.15.3) Aborted (core dumped)
I tried re-installing VLC but that did not work.
update: Uh oh… it’s affecting other programs as well. Audacious does not work either and returns the same error.