Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Constraint' not found in /home/benjamincb/demos/acdg-site/vendor/symfony/doctrine-bridge/Validator/Constraints/UniqueEntity.php:25 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/symfony/doctrine-bridge/Validator/Constraints/UniqueEntity.php on line 25