Fatal error: Uncaught Error: Interface "Symfony\Component\HttpFoundation\Session\Attribute\AttributeBagInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\http-foundation\Session\Attribute\AttributeBag.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\http-foundation\Session\Attribute\AttributeBag.php on line 17