Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\ConstraintValidator' not found in D:\workspaces\liZiPingBack\vendor\symfony\validator\Constraints\ChoiceValidator.php:27 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\validator\Constraints\ChoiceValidator.php on line 27