Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Driver\AbstractMySQLDriver' not found in /home/app/htdocs/message_gateway/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/Driver.php:9 Stack trace: #0 {main} thrown in /home/app/htdocs/message_gateway/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/Driver.php on line 9