Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Constraint' not found in /home/soh-works/www/Stepup_test/vendor/symfony/doctrine-bridge/Validator/Constraints/UniqueEntity.php:24 Stack trace: #0 {main} thrown in /home/soh-works/www/Stepup_test/vendor/symfony/doctrine-bridge/Validator/Constraints/UniqueEntity.php on line 24