Sonoma 14.4 (23E214) was recently released. A lot of improvements and security updates have been issued since 14.2.1 and I recommend doing the update before anything else. I had been keeping up with all of the beta releases (on a couple of external drives, of course) and v. 14.4 is quite stable, as far as I can tell, after at least three days of running. Hopefully this will fix your problem with the screen share error. Don’t forget to do full backups before updating.