I have the same issue. The free version works just fine but the paid version will not show the map. I've reinstalled, rebooted...everything I can think of. No idea!!
I don't think this is just a Weatherbug issue. I just discovered that Maps is also telling me I am in a different location.
Seems like an issue w/ GPS in general! Satellite problems maybe?? who knows...
Do you have "enable updates" checked in WB's preferences?
BTW, I notice that today, everything seems to be working OK. I'm wondering if there was a glitch that's been fixed by the WB people??