Fatal error: Uncaught Error: Class "MediaWiki\Notification\Middleware\FilterMiddleware" not found in /var/www/html/w/includes/Notification/Middleware/SuppressNotificationByTypeMiddleware.php:12 Stack trace: #0 {main} thrown in /var/www/html/w/includes/Notification/Middleware/SuppressNotificationByTypeMiddleware.php on line 12