Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in /var/www/html/sitefelicien/azuracast/backend/src/Validator/Constraints/UniqueEntity.php:28 Stack trace: #0 {main} thrown in /var/www/html/sitefelicien/azuracast/backend/src/Validator/Constraints/UniqueEntity.php on line 28