Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Resource\SelfCheckingResourceInterface" not found in /home/zdpktgd/ptc/vendor.old/symfony/config/Resource/ReflectionClassResource.php:22 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/config/Resource/ReflectionClassResource.php on line 22