Fatal error: Uncaught Error: Class 'Symfony\Bundle\FrameworkBundle\Controller\AbstractController' not found in /home/benjamincb/demos/acdg-site/vendor/contao/core-bundle/src/Controller/AbstractController.php:26 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/contao/core-bundle/src/Controller/AbstractController.php on line 26