Fatal error: Uncaught Error: Interface "Composer\DependencyResolver\Operation\OperationInterface" not found in /home/zdpktgd/ptc/vendor.old/symfony/flex/src/InformationOperation.php:11 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/flex/src/InformationOperation.php on line 11