Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Kernel" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\http-kernel\Tests\Fixtures\KernelForTest.php:17 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\http-kernel\Tests\Fixtures\KernelForTest.php on line 17