Fatal error: Uncaught Error: Class "SMW\MediaWiki\Api\Tasks\Task" not found in /var/www/html/extensions/SemanticMediaWiki/src/MediaWiki/Api/Tasks/UpdateTask.php:17 Stack trace: #0 {main} thrown in /var/www/html/extensions/SemanticMediaWiki/src/MediaWiki/Api/Tasks/UpdateTask.php on line 17