Fatal error: Uncaught Error: Class 'Sonata\AdminBundle\Mapper\BaseGroupedMapper' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/admin-bundle/Show/ShowMapper.php:28 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/admin-bundle/Show/ShowMapper.php on line 28