Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\Session\Storage\Proxy\AbstractProxy" not found in D:\Application\www\Training\vendor\symfony\http-foundation\Session\Storage\Proxy\NativeProxy.php:21 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\http-foundation\Session\Storage\Proxy\NativeProxy.php on line 21