Missing Compass window

Does anyone know how to get rid of the “missing compass” warning?
I am using only the GPS (No compass), but every time I go into the Setup compass tab I get this message.

How did you resolve this?
It took me a few hours just to get MP to see the UAVCAN again after mistakenly “remove missing” compasses.
Mine does appear to work, just claims it is missing.

I wish I can tell you how, but it fixed itself so it seems.