Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\HeaderBag' not found in /home/devypfrfhn/avancement.devyp.fr/vendor-old/symfony/http-foundation/ResponseHeaderBag.php:19 Stack trace: #0 {main} thrown in /home/devypfrfhn/avancement.devyp.fr/vendor-old/symfony/http-foundation/ResponseHeaderBag.php on line 19