Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Builder\ConfigBuilderInterface" not found in /home/zdpktgd/ptc/var/cache.old/dev/Symfony/Config/SecurityConfig.php:17 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/var/cache.old/dev/Symfony/Config/SecurityConfig.php on line 17