[User Error]: Unable to connect to Database. Please verify the username, password, grant permissions and the database status. (library/class.SWIFT.php:591)

[User Error]: Unable to connect to Database. Please verify the username, password, grant permissions and the database status. (library/class.SWIFT.php:591) Occurs when the __swift/config/config.php file contains something else than: define('DB_CHARSET', 'utf8');