Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Kernel' not found in /home/app/htdocs/lidia/vendor/symfony/http-kernel/Tests/Fixtures/KernelWithoutBundles.php:18 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/http-kernel/Tests/Fixtures/KernelWithoutBundles.php on line 18