Fatal error: Uncaught Error: Interface 'Sonata\BlockBundle\Block\BlockLoaderInterface' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/block-bundle/Block/Loader/ServiceLoader.php:17 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/block-bundle/Block/Loader/ServiceLoader.php on line 17