Fatal error: Uncaught Error: Interface "MediaWiki\Extension\BetaFeatures\Hooks\GetBetaFeaturePreferencesHook" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\Hooks\BetaPreferenceHooks.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\Hooks\BetaPreferenceHooks.php on line 15