Fatal error: Uncaught Error: Class 'Sonata\UserBundle\Admin\Model\GroupAdmin' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/user-bundle/Admin/Document/GroupAdmin.php:16 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/user-bundle/Admin/Document/GroupAdmin.php on line 16