Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraints\Existence" not found in /home/dodom2/public_html/cgilink.biz/vendor/symfony/validator/Constraints/Optional.php:20 Stack trace: #0 {main} thrown in /home/dodom2/public_html/cgilink.biz/vendor/symfony/validator/Constraints/Optional.php on line 20