Fatal error: Uncaught Error: Class 'Symfony\Component\Templating\Helper\Helper' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/block-bundle/Templating/Helper/BlockHelper.php:31 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/block-bundle/Templating/Helper/BlockHelper.php on line 31