Since taking Black Powder Avenger levels, I can no longer use curses. This change coincides with the recent bug fix to Hexblades as well. The curses and the number thereof have remained the same, along with all other Hexblade feats, including curse focus. This is the error message I receive whenever I try(see below), it expends the curse number as well if that helps.
If it helps I have the same amount of levels of Hexblade as I do BPA, I am unaware if this affects anything as well.