Fatal error: Uncaught Error: Class 'Sonata\AdminBundle\Mapper\BaseGroupedMapper' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/admin-bundle/Form/FormMapper.php:27 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/admin-bundle/Form/FormMapper.php on line 27