What can I do to fix this?
Quit Bridge and first use Apple Disk utility to check and repair the permissions for your start up disk. After this has been done restart Bridge holding down option (alt) key and choose reset preferences.
When still in trouble also look at PS. Be sure to have all your customized settings, tools brushes and actions etc. saved as a back up so you can easily reload them if needed. The restart PS holding down shiftoptioncmd and also in here choose reset preferences. Again start Bridge holding down option key and again reset prefs. Try again. Could you report back if this worked?