Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\RequestStack" not found in /media/jean/learning/huagai/drupal/vendor/symfony/http-kernel/Debug/VirtualRequestStack.php:24 Stack trace: #0 {main} thrown in /media/jean/learning/huagai/drupal/vendor/symfony/http-kernel/Debug/VirtualRequestStack.php on line 24