Fatal error: Uncaught Error: Class "Symfony\Component\Validator\ConstraintValidator" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\validator\Constraints\AbstractComparisonValidator.php:28
Stack trace:
#0 {main}
thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\validator\Constraints\AbstractComparisonValidator.php on line 28