Fatal error: Uncaught Error: Interface "Symfony\Component\Validator\ConstraintValidatorInterface" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\validator\ConstraintValidator.php:21 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\validator\ConstraintValidator.php on line 21