Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\Session\Storage\Proxy\AbstractProxy" not found in D:\Application\www\Training\vendor\symfony\http-foundation\Tests\Session\Storage\Proxy\AbstractProxyTest.php:19 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\http-foundation\Tests\Session\Storage\Proxy\AbstractProxyTest.php on line 19