[2020] I cant buy the game as a Gift

If you own the game, you cannot purchase the two pack; When buying the two pack the first copy of the game MUST go to the purchasing party, It's a limitation on Steam's end to reduce key reselling. So you'll have to buy single copies of the game, or give a gift card to your friend or something and have him buy the 2 pack.

IF you're not attempting to buy the two pack, then I've got nothing; it should work. :S