Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Definition" not found in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/ChildDefinition.php:22 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/ChildDefinition.php on line 22