Fatal error: Uncaught Error: Interface "Symfony\Component\HttpFoundation\Session\Attribute\AttributeBagInterface" not found in D:\xampp\htdocs\dropifypro\vendor\symfony\http-foundation\Session\Attribute\AttributeBag.php:19 Stack trace: #0 {main} thrown in D:\xampp\htdocs\dropifypro\vendor\symfony\http-foundation\Session\Attribute\AttributeBag.php on line 19