Did an upgrade to WPMU dashboard - Admin are no longer accessable

I just did the update for your dashboard and now the admin area of site displays a fatal error.

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 37545 bytes) in /home/bdhhs/public_html/wp-includes/functions.php on line 364

I hope there is a simple fix for this. I thought I would post it to you before I started troubleshooting it.

This is a bit urgent thanks

Steve