Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Exception\ValidatorException' not found in C:\xampp\htdocs\plugins\Symfony\Component\Validator\Exception\ConstraintDefinitionException.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Validator\Exception\ConstraintDefinitionException.php on line 14