Thank you, indeed I had a stale version: # dpkg-query -W gstreamer1.0-plugins-bad
gstreamer1.0-plugins-bad:amd64 1:1.18.4-dmo4+deb11u1 Issue has now been resolved by: # apt-get remove --purge gstreamer1.0-plugins-bad libgstreamer-plugins-bad1.0-0 and then reinstalling those packages that were dependent on those above: # apt-get install zenity atril font-manager geany-plugin-markdown geany-plugins yelp Thank a lot for the help! This ticket can be closed.
