Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\RequestStack" not found in D:\Apache24\www\qilu\back-end\vendor\symfony\http-kernel\Debug\VirtualRequestStack.php:24 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu\back-end\vendor\symfony\http-kernel\Debug\VirtualRequestStack.php on line 24