Cannot activate Golem on table

I am trying to make my first golem and have collected random parts. I am currently trying to use a Lightning Rod head, stone guardian arms (with an maul arm on one of them), an Iron guardian torso, and both a crystalline and iron guardian leg. I have all the pieces assembled on the table, but I cannot get the “ritual” to activate on the far eight tab. Am I missing something here?

I don’t know 100% but could the issue be the mixed parts? Honest question. I’ve only ever used parts of the same type.

Ive read guides that say you can mix and match parts.

I simply haven’t tried to mix parts. Is one arm empty?

I have mixed up parts and finished a golem, so I don’t think that is the reason. Are you encumbered?

Yes if you are over encumbered you cannot craft golem

Can your character stand on the left front corner while doing the activation ritual? I had to remove something that was blocking me from standing there once to get it to work.