idabonnin on "[Plugin: All-in-One Event Calendar] fatal error : Class 'Ai1ec_Time_Utility' not found"

Hi,

I don't know why I have this message : Fatal error: Class 'Ai1ec_Time_Utility' not found in /homepages/9/d384431762/htdocs/wp-content/themes-ai1ec/vortex/agenda-widget.php on line 19.

Can you help me please ?

Many thanks in advance,

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