Fatal error: Uncaught Error: Class "MediaWiki\Extension\Notifications\Formatters\EchoEventPresentationModel" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\Notifications\RemovedTopicPresentationModel.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\Notifications\RemovedTopicPresentationModel.php on line 19