Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\Notifications\SubscribedNewCommentPresentationModel" not found in /var/www/html/extensions/DiscussionTools/includes/Notifications/AddedTopicPresentationModel.php:12 Stack trace: #0 {main} thrown in /var/www/html/extensions/DiscussionTools/includes/Notifications/AddedTopicPresentationModel.php on line 12