Just upgraded to 21.10 from 21.04 Had the same (more, a similar) issue.
After opening the Settings app from the Applications overview and selecting "Appearance", the window crashed and an Ubuntu crash window appeared (intuitively hit "Send" before taking a deeper look into it...). After that, Settings cannot be reopened - It shows as loading in the top bar, but never opens. Persists just the same after reboot. Trying to open from the terminal results in the following: ~$ gnome-control-center (gnome-control-center:5761): GLib-GIO-ERROR **: 12:15:41.676: Settings schema 'org.gnome.gedit.preferences.editor' is not installed Trace/breakpoint trap (core dumped) I need to run it with sudo -i to get it open. Interesting enough, in the resulting window there is no "Appearance" option. After installing gedit (whyever this has not been installed already) it works pefectly fine again. However, I very much wonder if gedit was the source of the issue, why was I able to launch and use it in the first place... -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1946610 Title: Settings won't open after update Status in gnome-control-center package in Ubuntu: Incomplete Bug description: After a recent update in 21.10, I noticed the Settings app refuses to launch. (gnome-control-center:9800): GLib-GIO-ERROR **: 17:58:26.797: Settings schema 'org.gnome.gedit.preferences.editor' is not installed Trace/breakpoint trap (core dumped) System: Ubuntu 21.10 Gnome version: 40.5 Arch: amd64 (idk if this is a securtiy bug) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1946610/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

