Fatal error: Uncaught Error: Class 'Sonata\AdminBundle\Admin\Admin' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/notification-bundle/Admin/MessageAdmin.php:21 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/notification-bundle/Admin/MessageAdmin.php on line 21