So I've created this funny shape and I'm trying to fill the space in between the outside skin and inside skin with the ribs.

But when I tried to do cut "with surface" to remove the excess on the outside skin and inside skin, I got this rebuild error.

TBH, I'm sure it's something in how I created the ribs that are somehow causing this error but I'm not quite sure.  Any suggestions on how to accomplish what I'm trying to accomplish the right way?  Please advise?