White page after turning board on.
 

I turned my board on to allow a user to register, and it locked up. When I refreshed all I get are white pages. I have a few error in my logs, but this is the one that popped when this all happened.
[15-Dec-2012 13:22:53 America/Denver] PHP Fatal error: Call to a member function isAdministrator() on a non-object in /core/vb/api/state.php on line 148