TypeError : Cannot Read Property "X" of Undefined

KiriMoto 2.7.1 - Onshape
I’m a complete beginner here, so forgive my obvious blindness. I have imported a part from an Onshape Studio (on Chrome Browser). When I hit start-> preview I am getting …
TypeError : Cannot Read Property “X” of Undefined

What have I missed ?

I can upload a .km when Im not a new user.

Thanks,
Josh

Hi @Josh_Hyman … I think we resolved this on Discord? This was the clip-to-stock setting when stock was not set? If so, I added code to detect and prevent this situation, which will be live later today.