Fatal error: Uncaught Error: Interface 'Xibo\XTR\TaskInterface' not found in /home/rijschoolmk/xibo.rijschool-mk.be/lib/XTR/EmailNotificationsTask.php:20 Stack trace: #0 {main} thrown in /home/rijschoolmk/xibo.rijschool-mk.be/lib/XTR/EmailNotificationsTask.php on line 20