Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in /home/ldt/public_html/canvas/udoit/vendor/symfony/doctrine-bridge/Validator/Constraints/UniqueEntity.php:25 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/symfony/doctrine-bridge/Validator/Constraints/UniqueEntity.php on line 25