Fatal error: Uncaught Error: Interface "MediaWiki\Hook\ParserOutputPostCacheTransformHook" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\Hooks\ParserHooks.php:25 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\Hooks\ParserHooks.php on line 25