Union issue? unknown

What I am trying to do is union a pathway I had made–which is not wanting to work.


I am encountering this error constantly trying to do specific parts of the pathway, however; this does not want to work.

I have looked on the devforum and saw some people have had this same exact error before–but I havent found any solutions.

Try selecting each separately and union and then ctrl z to see which one might be causing the issue.

I did try unioning different parts—im out of town rn so ill try it.