Problem with Header Height

Hi, thanks for this great datafield, for me one of the best.

I've a problem with Header Height, I think it's a bug. During the configuration, also leaving all the default values unchanged, I get an error message near the Header Height (%) field "It cannot be greater than zero". I attach you a screenshot.

To proceed I must necessarily set the value to zero, not being able to see the headers

I've a Forerunner 645 Music.

Let me know if you need any other info.

Thanks in advice!

Massimo