Fatal error: Uncaught Error: Class "Symfony\Component\Form\Util\ServerParams" not found in C:\xampp\htdocs\bateriasec\vendor\symfony\form\Extension\Validator\Util\ServerParams.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bateriasec\vendor\symfony\form\Extension\Validator\Util\ServerParams.php on line 19