Fatal error: Uncaught Error: Class 'Symfony\Component\Routing\Loader\XmlFileLoader' not found in /home/app/htdocs/message_gateway/vendor/symfony/routing/Tests/Fixtures/CustomXmlFileLoader.php:20 Stack trace: #0 {main} thrown in /home/app/htdocs/message_gateway/vendor/symfony/routing/Tests/Fixtures/CustomXmlFileLoader.php on line 20