Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Kernel" not found in C:\xampp\htdocs\electronica\vendor\liuggio\ExcelBundle\Tests\app\AppKernel.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\liuggio\ExcelBundle\Tests\app\AppKernel.php on line 6