Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface" not found in /home/zdpktgd/ptc/vendor.old/symfony/monolog-bundle/DependencyInjection/Compiler/AddSwiftMailerTransportPass.php:26 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/monolog-bundle/DependencyInjection/Compiler/AddSwiftMailerTransportPass.php on line 26