Why is the launching mechanism not flinging treats?

Why is the launching mechanism not flinging treats?

I have the black Petcube bites. The wheel is spinning to drop treats into the launching compartment but the little paddle that launches the treats out is not moving at all. It sounds like a gear keeps spinning and then just stops. There is no treats stuck behind the flinger from the bottom trap door. I am using the recommended Blue Buffalo Blue bits dog treats.