Fatal error: Uncaught Error: Class 'Sonata\NotificationBundle\Model\Message' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/notification-bundle/Entity/BaseMessage.php:16 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/notification-bundle/Entity/BaseMessage.php on line 16