Core loss in LTpowerCAD model fo LT8390 always the same

I have setup a circuit with low output power and am getting a large amount of core loss in the inductor of 1.33W. No matter what I change about the design including the inductor that core loss value never changes. Is there is error in the LTpowerCAD? I would upload the simulation but there is an error when I try.

Thank you,