Fatal error: Uncaught Error: Class 'MediaWiki\TimedMediaHandler\TimedText\Writer' not found in /var/www/html/wiki_2023/extensions/TimedMediaHandler/includes/TimedText/VttWriter.php:5 Stack trace: #0 {main} thrown in /var/www/html/wiki_2023/extensions/TimedMediaHandler/includes/TimedText/VttWriter.php on line 5