Fatal error: Uncaught Error: Class "Symfony\Flex\Configurator\AbstractConfigurator" not found in /home/zdpktgd/ptc/vendor.old/symfony/flex/src/Configurator/DockerfileConfigurator.php:23 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/flex/src/Configurator/DockerfileConfigurator.php on line 23