I can't reproduce this on fresh Ubuntu MATE 21.10 install. Please reinstall both applications using
sudo apt-get update sudo apt-get install --reinstall mpv celluloid update-menus Then retry and if error persists - put the contents of `~/.config/mimeapps.list` file along with output of `apt-cache policy mpv celluloid` to next comment. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1956863 Title: Preferred Applications not listing installed application To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1956863/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
