Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Argument\IteratorArgument" not found in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/Argument/TaggedIteratorArgument.php:19 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/dependency-injection/Argument/TaggedIteratorArgument.php on line 19