Getting an error when I interact with a slave without incest consent, no text shows on physical interactions (Touch, Hug, Hold Hands, or kissing) and the text window doesn't reset so the environmental influence messages just stack up. I haven't had the chance to do this with anyone actually related to me but I imagine it's the same.
Viewing post in Aric's Expansion Rebred
Please update the mod, see this post if you need instructions: https://itch.io/post/1009788
Just to build on what Ank said, it does look like maybe it was either not updated or updated using the "drag into the same folder and replace" method. The fetishopinion array isn't one that is tied to the global state, so it if isn't finding it that means that your Globals script hasn't been updated.
If you have updated it, I would be sure the start the game, deselect Arics and apply (which will restart again) then reapply the mod. That will reset your globals file.