This is because magpie has a dependency on mutter-common. The schema comes from the mutter ubuntu x11 patch which has been temporarily disabled
https://launchpad.net/ubuntu/+source/mutter/+changelog Once it has been readded then things will work correctly ** Also affects: mutter (Ubuntu) Importance: Undecided Status: New ** Changed in: budgie-desktop (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2058847 Title: budgie-wm crashes immediately when mutter-common has been upgraded to version 46.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/budgie-desktop/+bug/2058847/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs