I just signed up, but when I tried to offer to write for Harry Potter, it gave me an error: "The following fandom tags aren't canonical and can't be used: Harry Potter - Rowling"

I don't think I can do anything to fix this since it was a poll option, so I just unclicked that fandom and resubmitted. (Maybe the canonical name has changed since the poll was made or something?) But ftr, I would be willing to write in that fandom.