Apple Music app keeps crashing Mac OS 12.6

The Music app on my MBP was not set to Sync Library. When I checked this box in Music > Preferences, the app crashed within a few seconds. Restarting the app only results in a nearly instant crash.

When I start the app in Safe Mode, it works just fine, except it is not actually syncing my playlists with my other devices. It says it has temporarily disabled any visual plugins that I may have installed, but I haven't installed any. The Library > iTunes > iTunes Plug-Ins folder is empty.

When I try to uncheck the Sync Library when Music is open in Safe Mode, I hit 'save' but re-opening Preferences reveals that the box is still checked. I can uncheck other boxes and these changes are saved. Only the 'Sync Library' refuses to allow itself to be unchecked.

When I tried to delete and reinstall Music, it refused to let me delete the app either by command-delete or dragging it to the trash. And yes, I rebooted.

I have two goals: I want Music to run normally, and I want it to sync downloads and changes to my playlists to my other devices. (I do get instant syncing between my 2010 iMac and my phone--just my MBP won't sync.)

I am running Mac OS 12.6 Monterey.

Thanks for any help you can provide!