Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Exception\ServerException' not found in /var/www/typo3/vendor/doctrine/dbal/lib/Doctrine/DBAL/Exception/ConstraintViolationException.php:10 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/doctrine/dbal/lib/Doctrine/DBAL/Exception/ConstraintViolationException.php on line 10