I had this same error. It was because I had an object in blender with no vertices. I had created a cube and deleted all the vertices from it, but the object was still there. I deleted the object and it worked after that.
I had this same error. It was because I had an object in blender with no vertices. I had created a cube and deleted all the vertices from it, but the object was still there. I deleted the object and it worked after that.