I'm not seeing any errors or failure messages.
You won't see an error message when the weather auto updates. The time stamps at the bottom of the main Weather Watcher Live window will not change though.
I have, however, seen it switch mysteriously to another weather station...from the one in Charleston, WV to the one in Huntington, WV.
That will happen if your selected weather station is not available. WeatherBug's system automatically jumps to the closest available weather station until your weather station is available again.