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