Fatal error: Uncaught Error: Class "MediaWiki\SpecialPage\SpecialPage" not found in /home/floten1/q.tenbergen.ca/extensions/CategoryTree/includes/CategoryTreePage.php:38 Stack trace: #0 {main} thrown in /home/floten1/q.tenbergen.ca/extensions/CategoryTree/includes/CategoryTreePage.php on line 38