Fatal error: Uncaught Error: Class "Symfony\Component\Routing\Loader\XmlFileLoader" not found in D:\Application\www\Training\vendor\symfony\routing\Tests\Fixtures\CustomXmlFileLoader.php:20 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\routing\Tests\Fixtures\CustomXmlFileLoader.php on line 20