Fatal error: Uncaught Error: Class "MediaWiki\Upload\Exception\UploadStashException" not found in /var/www/html/w/includes/Specials/Exception/SpecialUploadStashTooLargeException.php:16 Stack trace: #0 {main} thrown in /var/www/html/w/includes/Specials/Exception/SpecialUploadStashTooLargeException.php on line 16