Fatal error: Uncaught Error: Class 'Twig_Extension' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/block-bundle/Twig/Extension/BlockExtension.php:16 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/block-bundle/Twig/Extension/BlockExtension.php on line 16