Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Exception\ServerException' not found in /opt/lampp/htdocs/kuesioner/vendor/doctrine/dbal/lib/Doctrine/DBAL/Exception/LockWaitTimeoutException.php:8 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/doctrine/dbal/lib/Doctrine/DBAL/Exception/LockWaitTimeoutException.php on line 8