Fatal error: Uncaught Error: Class 'Twig_Extension' not found in /home/lafaamicps/www/symfony/vendor/knplabs/knp-markdown-bundle/Knp/Bundle/MarkdownBundle/Twig/Extension/MarkdownTwigExtension.php:7 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/knplabs/knp-markdown-bundle/Knp/Bundle/MarkdownBundle/Twig/Extension/MarkdownTwigExtension.php on line 7