thesturs on "[Plugin: All-in-One Event Calendar] Weird 403 error"

One one of my sites I am getting the error below

" Failed to load resource: the server responded with a status of 403 (Forbidden) - http://zumbawithmegan.com/wordpress/?ai1ec_render_css=1390578551&ver=3.5.2 "

Thanks for any help

Specs:
Website: http://zumbawithmegan.com/
Windows 7
Chrome Version 32.0.1700.76 m
All-in-One Event Calendar by Timely: Version 1.10.9-standard
Genesis child theme

http://wordpress.org/plugins/all-in-one-event-calendar/