Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Dumper\Dumper" not found in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/Dumper/GraphvizDumper.php:31 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/Dumper/GraphvizDumper.php on line 31