Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractExtension" not found in C:\laragon\www\sfomantic\vendor\symfony\form\Extension\Validator\ValidatorExtension.php:28 Stack trace: #0 {main} thrown in C:\laragon\www\sfomantic\vendor\symfony\form\Extension\Validator\ValidatorExtension.php on line 28