Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\ThreadItem\ContentThreadItem" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\ThreadItem\ContentHeadingItem.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\ThreadItem\ContentHeadingItem.php on line 9