I am just trying to check here... is this using my driver ( [PROJECT] Driver for Ambient API/Local and Ecowitt) or a different one?
If so, you can always post questions (if it does not get answered here) to that main thread.
Red labeled fields in the Preferences for the driver are just one of the things I do to help identify required fields. It does not indicate a problem with that field. But, it sounds like you are getting caught on the "custom" reporting you need to set the weather station to do, so it can send the data to the Hubitat locally. @stephen_nutt just posted about that as I was editing this... 