Fatal error: Uncaught Error: Class 'Concrete\Core\Notification\Events\ServerEvent\AbstractConcreteEvent' not found in /home/geofieldwa/www/concrete/src/Notification/Events/ServerEvent/ThumbnailGeneratedEvent.php:10 Stack trace: #0 {main} thrown in /home/geofieldwa/www/concrete/src/Notification/Events/ServerEvent/ThumbnailGeneratedEvent.php on line 10