I am trying to create a solid between these two sketches, One being a regular 2D sketch and the other a 3D. The picture shows what I want to do, but it throws the "Cannot make two planar end faces to cap the side sheet" error for the loft and the "Cannot create a 3D end cap face" when I try to use the Boundary Boss/Base command.

I was thinking I could split up the loft into diffrent sections and hope they merge right; but, I have run into this problem several times now and I'm thinking there must be a better way to accomplish this. I did find a few threads that vaguely resembled what I am trying to do but most of them employed surfaces to accomplish it, so, there was no solid to perform other operations on, only a volume-less collection of surfaces. I have included the file.

Any help with this would be greatly appreciated!