Fatal error: Uncaught Error: Class "EchoEventPresentationModel" not found in /var/www/html/extensions/DiscussionTools/includes/Notifications/SubscribedNewCommentPresentationModel.php:22 Stack trace: #0 {main} thrown in /var/www/html/extensions/DiscussionTools/includes/Notifications/SubscribedNewCommentPresentationModel.php on line 22