Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Dumper\DumperInterface" not found in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/Dumper/Dumper.php:21 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/Dumper/Dumper.php on line 21