Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\HttpKernel" not found in D:\Application\www\Training\vendor\symfony\http-kernel\Tests\HttpCache\TestMultipleHttpKernel.php:22 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\http-kernel\Tests\HttpCache\TestMultipleHttpKernel.php on line 22