Fatal error: Uncaught Error: Class "Symfony\Component\Validator\ConstraintValidator" not found in C:\Apache24\htdocs\drupal10\vendor\symfony\validator\Constraints\UniqueValidator.php:22 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\drupal10\vendor\symfony\validator\Constraints\UniqueValidator.php on line 22