Adding kwh cost to Aeon Labs Smart Switch

After some playing around with the “Z-Wave Metering Switch” device type to add a cost tile, I am at a loss. I was using NEW: Aeon Home Energy Monitor v2 Device from @storageanarchy as a reference to try and add the cost per kwh. I do not get any value populated in the tile. any guidance is greatly appreciated.

Many Thanks.

Here is what I am getting: