Fatal error: Uncaught Error: Class "MediaWiki\Extension\Notifications\Formatters\EchoEventPresentationModel" not found in /var/www/html/extensions/Thanks/includes/EchoCoreThanksPresentationModel.php:16 Stack trace: #0 {main} thrown in /var/www/html/extensions/Thanks/includes/EchoCoreThanksPresentationModel.php on line 16