Fatal error: Uncaught Error: Interface "Symfony\Component\Validator\Validator\ContextualValidatorInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\validator\Validator\RecursiveContextualValidator.php:44 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\validator\Validator\RecursiveContextualValidator.php on line 44