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