Can’t download Hoonigan DLC!!!

For some reason I can’t download the Forza 7 Hoonigan Car Pack, it’s really annoying me! Every time I try and download it, I just get this exact message: “MARKETPLACE ERROR - This is exclusive content and cannot be purchased at this time.” BTW, I have the disc version of the game.

It was for digital only editions
As was stated when it was first announced and has been said another 100 times since