Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in /home/zdpktgd/ptc/vendor.old/symfony/security-core/Validator/Constraints/UserPassword.php:17 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/security-core/Validator/Constraints/UserPassword.php on line 17