Hello everyone, I just logged into my char (Warlock @ Ragnaros) i queued for bg and when i joined i wasn't able to attack anyone just getting "Invalid Target"
Ofc, i wasn't targetting my allies, i was targetting horde players but still couldn't.
Rain of Fire worked, so as howl of terror, any other warlock spell wasn't available.
I had this issue for a long time until I finally figured out that the "alt"-button function was "activated" according to the game, even though it wasn't. You just click the "alt"-button one more time and it will work.