Fatal error: Uncaught Error: Class "Symfony\Component\Validator\ConstraintValidator" not found in C:\xampp\htdocs\electronica\vendor\jms\di-extra-bundle\JMS\DiExtraBundle\Tests\Fixture\Validator\Validator.php:29 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\jms\di-extra-bundle\JMS\DiExtraBundle\Tests\Fixture\Validator\Validator.php on line 29