Fatal error: Uncaught Error: Class 'ZendDiagnostics\Check\AbstractCheck' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/notification-bundle/Backend/BackendHealthCheck.php:17 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/notification-bundle/Backend/BackendHealthCheck.php on line 17