Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\HttpKernel" not found in /var/www/apache/dev/cal/web/vendor/symfony/http-kernel/Tests/HttpCache/TestMultipleHttpKernel.php:21 Stack trace: #0 {main} thrown in /var/www/apache/dev/cal/web/vendor/symfony/http-kernel/Tests/HttpCache/TestMultipleHttpKernel.php on line 21