Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\HttpKernel' not found in E:\xampp\htdocs\vendor\symfony\http-kernel\Tests\HttpCache\TestHttpKernel.php:22 Stack trace: #0 {main} thrown in E:\xampp\htdocs\vendor\symfony\http-kernel\Tests\HttpCache\TestHttpKernel.php on line 22