Error with Surface

Hi all.

I'm not even sure how to ask the question.  I'm trying to create a simple surface but when it comes to selecting the last airfoil for the RC plane, it gives me an error that I can't figure out what it is.

As you can see, there's no error on the sketches unti I tried to add the last airfoil.

Any advice on how to identify the issue and fix it?

SolidworksParts And Features