Fatal error: Uncaught Error: Interface "Symfony\Component\HttpFoundation\Session\FlashBagAwareSessionInterface" not found in /home/lun45tyra31/public_html/demo/vendor/symfony/http-foundation/Session/Session.php:33 Stack trace: #0 {main} thrown in /home/lun45tyra31/public_html/demo/vendor/symfony/http-foundation/Session/Session.php on line 33