Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpFoundation\Session\Flash\FlashBagInterface' not found in /home/devilinf/maitres-couvreurs.fr/web_pool/marne-vitry-le-francois/vendor/symfony/http-foundation/Session/Flash/AutoExpireFlashBag.php:19 Stack trace: #0 {main} thrown in /home/devilinf/maitres-couvreurs.fr/web_pool/marne-vitry-le-francois/vendor/symfony/http-foundation/Session/Flash/AutoExpireFlashBag.php on line 19