Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Exception\ConstraintViolationException' not found in /home/edmedu/www/edmclass.com/admin.edmclass.com/vendor/doctrine/dbal/src/Exception/UniqueConstraintViolationException.php:8 Stack trace: #0 {main} thrown in /home/edmedu/www/edmclass.com/admin.edmclass.com/vendor/doctrine/dbal/src/Exception/UniqueConstraintViolationException.php on line 8