Fatal error: Uncaught Error: Class "MediaWiki\Extension\Notifications\Formatters\EchoEventFormatter" not found in /var/www/html/orian-wiki/extensions/Echo/includes/Formatters/EchoFlyoutFormatter.php:16 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/extensions/Echo/includes/Formatters/EchoFlyoutFormatter.php on line 16