Fatal error: Uncaught Error: Interface "MediaWiki\RCFeed\RCFeedFormatter" not found in /var/www/html/w/includes/RCFeed/MachineReadableRCFeedFormatter.php:22 Stack trace: #0 {main} thrown in /var/www/html/w/includes/RCFeed/MachineReadableRCFeedFormatter.php on line 22