Fatal Error: Cancel/Delete attendance From RSVP - Events+

I am trying to remove a user from an event. On the event page under "Event RSVPs" when I try to Cancel attendance or
Delete attendance entirely I get the error message:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 55198 bytes) in /home/content/35/11098935/html/wp-content/plugins/events-and-bookings/lib/class_eab_template.php on line 267

What is the best way to remove someone from an event? I had two spam registrations and its throwing off our numbers.

I have granted support access on the back end of the website: Support access is ACTIVE until January 19, 2015 12:03 pm

Thanks,
William