Fatal error: Uncaught Error: Class "EchoEventPresentationModel" not found in /var/www/html/orian-wiki/extensions/DiscussionTools/includes/Notifications/RemovedTopicPresentationModel.php:19
Stack trace:
#0 {main}
thrown in /var/www/html/orian-wiki/extensions/DiscussionTools/includes/Notifications/RemovedTopicPresentationModel.php on line 19