Fatal error: Uncaught Error: Class 'Ai1ec_Base' not found in /srv/drbd-web/home/chelix/public_html/wp-content/plugins/all-in-one-event-calendar/app/view/admin/all-events.php on line 3

Error: Class 'Ai1ec_Base' not found in /srv/drbd-web/home/chelix/public_html/wp-content/plugins/all-in-one-event-calendar/app/view/admin/all-events.php on line 3

Call Stack:
    0.0001     360096   1. {main}() /srv/drbd-web/home/chelix/public_html/wp-content/plugins/all-in-one-event-calendar/app/view/admin/all-events.php:0