Conic SPM structure: evaluate surface

I dont have all the plugins you are using, but it looks like you didn’t reparameterize the surface on the input to the Evalute Surface component. Right click on the S input, and select reparameterize.

By the way, when you are sharing a GH file, be sure to internalise any data you reference from Rhino. If you are not sure how, see the link below.