Fatal error: Uncaught Error: Class 'Twig_Extension' not found in /home/lafaamicps/www/symfony/vendor/nelmio/api-doc-bundle/Nelmio/ApiDocBundle/Twig/Extension/MarkdownExtension.php:7 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/nelmio/api-doc-bundle/Nelmio/ApiDocBundle/Twig/Extension/MarkdownExtension.php on line 7