If the weather is returning code 3200 (undefined) then no icon is shown. Try this:
Replace WOEID with the code you have (if you know it) and paste the line similar to the one below:
Update: I just resolved your area’s WOEID and got 1102170, which does indeed report 3200. I will see about re-centering the temperature on code 3200 so it at least doesn’t look weird.
Update 2: I pushed an update to remove the allocated space for the image if code 3200 is reported. This should re-center the temperature right above the location and make it look more appropriate.