I just did hit this today on 20.04. The workaround of "It turns out if you edit the settings of xfce4-appfinder to not keep an instance running in the background, the issue is fixed." fixed it for me.
** Tags added: focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1528035 Title: Empty application list when menu edited with MenuLibre To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/menulibre/+bug/1528035/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
