Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\ThreadItem\DatabaseThreadItem" not found in C:\xampp\htdocs\extensions\DiscussionTools\includes\ThreadItem\DatabaseHeadingItem.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\includes\ThreadItem\DatabaseHeadingItem.php on line 8