Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Controller\ControllerResolver' not found in /home/app/htdocs/message_gateway/vendor/symfony/http-kernel/Controller/ContainerControllerResolver.php:25 Stack trace: #0 {main} thrown in /home/app/htdocs/message_gateway/vendor/symfony/http-kernel/Controller/ContainerControllerResolver.php on line 25