Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractExtension" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\form\Extension\Validator\ValidatorExtension.php:27 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\form\Extension\Validator\ValidatorExtension.php on line 27