Fatal error: Uncaught Error: Interface "MediaWiki\Extension\Notifications\Hooks\BeforeCreateEchoEventHook" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\Hooks\EchoHooks.php:27 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\Hooks\EchoHooks.php on line 27