Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Kernel" not found in C:\xampp\htdocs\astra-backoffice\vendor\symfony\http-kernel\Tests\Fixtures\KernelWithoutBundles.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\symfony\http-kernel\Tests\Fixtures\KernelWithoutBundles.php on line 18