NEWBIE::Why does this service return a INFOTable within the test in Thingworx, but any external calls to return an empty object or string?

try {

    var devices = Things['ATS.Org'].ListDevices();

    var device;

    result = null;

    //logger.warn(devices)

    for each(device in devices.rows) {

        device = Things[device.EntityName];

        if (device.GetLastModifiedDate() > lastDTSCheck) {

           if (result == null) {

               logger.warn("Result is null");

               result = Things[device.name].GetPropertyValues();

               result.name = device.name;

           } else {

               logger.warn("Got a Result");

               result.AddRow(Things[device.name].GetPropertyValues().rows[0]);

               result.rows[result.getRowCount() - 1].name = device.name;

           }

        }

    }

    // I have tried each of these conversions as a means for returning the result object

    //    for an external request ( HTTPie, Postman, Curl, etc) and always get

    //

    //    b'{"dataShape":{"fieldDefinitions":{}},"rows":[]}'

    //

    //logger.warn("debugging the output? ..... " + result);

    //logger.warn("debugging the output 2 as json string" + result.ToJSON() );

    //logger.warn("debugging the output 3 as stringify: " + JSON.stringify(result) );

    //logger.warn("debugging the output 4 as toString: " + result.toString() );

    //result = result.toJSON();

    result

} catch (err) {

  logger.warn(me.name + ".MEB() [err]: " + err + ", " + err.lineNumber);

}