Loft between curves fails

I’m in the early stage of learning, trying to use devLoft to loft between the curves in this file, I can get two of the curves to loft, but not the others. The only error message I get is that the lofting failed. How can I figure out what is causing the loft to fail so I can fix it?

oloid 5.3dm (63.5 KB)

Odd. Works here. Rhino 8 macOS.