Fatal error: Uncaught Error: Class "Symfony\Component\Form\FormEvent" not found in D:\htdocs\SuiteCRM\tmp\package\upgrade\SuiteCRM-8.9.1-extracted\vendor\symfony\form\Event\PostSubmitEvent.php:22 Stack trace: #0 {main} thrown in D:\htdocs\SuiteCRM\tmp\package\upgrade\SuiteCRM-8.9.1-extracted\vendor\symfony\form\Event\PostSubmitEvent.php on line 22