I use an older version of CadStar, so my advice may not be perfect. If you go into the component footprint library, you should be able to look at the layers and see how many layers it has. See if there a default design with the same number of layers. I don't have CS in front of me right now, that's the best I can do off the top of my head. I really love the program though, so I'd like to help you get going.
That feels like you shouldn's have to do that, but it might be the fastest way to kill the error message.