I'm trying to add the Butler power-up to a board I own (we'll call it board 5). I have Butler enabled on 3 of my other boards where it works fine. I was able to add the Calendar power-up to board 5, but whenever I try to add the Butler power-up, a red "could not add power-up" error appears in the upper right. I have Trello Gold and the board has 2 other members besides me. Is this a known error, and are there any things I can try to resolve it?
