Fatal error: Uncaught Error: Class 'Twig_Extension' not found in /home/lafaamicps/www/symfony/vendor/braincrafted/bootstrap-bundle/Braincrafted/Bundle/BootstrapBundle/Twig/BootstrapFormExtension.php:19 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/braincrafted/bootstrap-bundle/Braincrafted/Bundle/BootstrapBundle/Twig/BootstrapFormExtension.php on line 19