My guess is that the fire pot is not heating due to the ignitor timing out (no pellets being fed). If the hopper/auger were empty you need to press the "primer" button to fast feed pellets into the fire pot to get it started. If the auger had pellets from a previous cook I don't know what is going on.
I think this is one of the "pitfalls" to just about anything that runs in this manner. Pellet stoves operate under the same principle. Pellet stoves have a "reset" button that must be repeatedly pressed enough times to get the pellets from the hopper, through the auger, and to the firepot. If the smoker has a "reset" or "primer" button, you can hit that.
So, that being said, the simple answer is to start the smoker, and physically place a small handful of pellets into the firepot. I do it every time, and mine never times out.