Hey guys, if you got the latest OTA update that it being mentioned in several other locations across this board, and still are getting the error with weather map updates... try performing a factory reset of the unit.  Not the "soft reset" of holding down the volume button, but navigating to the bottom of the main profile screen and selecting the reset button.
I gave that a try a few minutes ago based on advice from another poster on here, and now I am getting the weather maps, and possibly the TomTom "travel services" that we are supposed to get.  I'll know later about that after I take the truck out for a drive.... But at least weather is showing up now...