unknown error when no file provided

[PaTara43]

when entering the wrong password for controller while setting up integration, the file is reset, then, on another attempt with no file provided, it says - unknown error
in the logs

config = self._parse_config_file(user_input[CONF_CONFIG_FILE], user_input[CONF_PASSWORD])
                                     ~~~~~~~~~~^^^^^^^^^^^^^^^^^^
KeyError: 'config_file'