Fatal error: Uncaught Error: Class "MediaWiki\OutputTransform\ContentDOMTransformStage" not found in /var/www/html/w/includes/OutputTransform/Stages/HandleTOCMarkersDOM.php:20 Stack trace: #0 {main} thrown in /var/www/html/w/includes/OutputTransform/Stages/HandleTOCMarkersDOM.php on line 20