Could not load Sound preference pane.
I'm having a lot of issues with High Sierra. I'd like to roll it back but Im not sure that's an option. Anyway, right now and getting no sound at all. When I go to system presences and try to look at sound preferences, I see "Could not load Sound preference pane."
I'd like to fix that first but if it helps you at all, the app store always "quits unexpectedly" - same with quicktime. I can't open iTunes.
Any ideas?
iMac (27-inch, Late 2012), macOS High Sierra (10.13.2)