Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\ContainerBuilder' not found in /home/app/htdocs/lidia/vendor/symfony/dependency-injection/Tests/Fixtures/containers/container13.php:6 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/dependency-injection/Tests/Fixtures/containers/container13.php on line 6