Fatal error: Uncaught Error: Interface "MediaWiki\Extension\DiscussionTools\ThreadItem\ThreadItem" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\ThreadItem\CommentItem.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\ThreadItem\CommentItem.php on line 7