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