Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\HttpKernelBrowser" not found in /home/trairtil/public_html/vendor/symfony/http-kernel/Tests/Fixtures/TestClient.php:16 Stack trace: #0 {main} thrown in /home/trairtil/public_html/vendor/symfony/http-kernel/Tests/Fixtures/TestClient.php on line 16