Note: There is total 3 chairs you can make for 3 of the royals, you can see a 4th royal but no chair can be made.
Additionally the 3rd chair is behaving weirdly as in sometimes I'm able to craft it but sometimes i don't, I'm not sure what went wrong. Let me know if you can't make the 3rd chair(Fluff Chair)
More note: Make sure you have enough materials before crafting(10 prim, 5 sec) otherwise the crafting sys will break.