Fatal error: Uncaught Error: Class 'Sonata\AdminBundle\Mapper\BaseMapper' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/admin-bundle/Mapper/BaseGroupedMapper.php:22 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/admin-bundle/Mapper/BaseGroupedMapper.php on line 22