Fatal error: Uncaught Error: Class "MediaWiki\Upload\Exception\UploadStashException" not found in /var/www/html/w/includes/Upload/Exception/UploadStashZeroLengthFileException.php:13 Stack trace: #0 {main} thrown in /var/www/html/w/includes/Upload/Exception/UploadStashZeroLengthFileException.php on line 13