Welcome to the forum
It's nothing to worry about - just reboot your tf201 & the message should go away.
If not, it will just need a cold boot - see the link in my signature on how to do that.
DM client is to do with downloading firmware updates, so is unlikely to have any effect on the weather widget. I expect the tf201 is having problems seeing the satellites - as you know the GPS on the Prime is very, very weak & GPS needs a view of the sky to work well. You should find that turning on wifi location as well may help, but the essential problem will be with the poor GPS reception (which is an extremely well known & Asus acknowledged, fundamental design flaw on the tf201)