Fatal error: Uncaught Error: Class 'Symfony\Component\Templating\Helper\Helper' not found in /home/benjamincb/demos/acdg-site/vendor/knplabs/knp-menu-bundle/src/Templating/Helper/MenuHelper.php:11 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/knplabs/knp-menu-bundle/src/Templating/Helper/MenuHelper.php on line 11