Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Exception\ConstraintViolationException' not found in /home/app/htdocs/message_gateway/vendor/doctrine/dbal/lib/Doctrine/DBAL/Exception/ForeignKeyConstraintViolationException.php:10
Stack trace:
#0 {main}
thrown in /home/app/htdocs/message_gateway/vendor/doctrine/dbal/lib/Doctrine/DBAL/Exception/ForeignKeyConstraintViolationException.php on line 10