Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\Loader" not found in /home/zdpktgd/ptc/vendor.old/symfony/config/Loader/FileLoader.php:26 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/config/Loader/FileLoader.php on line 26