Recently, when I edit categories or entries I get the dreaded "An unknown error occurred." When I check the logs I see:
2017/12/11 20:41:51 [error] [exception.Craft\HttpException.403] Craft\HttpException in /srv/users/serverpilot/apps/0default/craft/app/services/UserSessionService.php:329
Not quite sure where to go from there. 403 makes it look like a permissions issue but my permissions are all setup just like I normally have them (744). Anyone got any ideas?