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