Tales From The Borderlands Gear is Nonredeemable; Please Help!

I’ve seen that this has happened to a few other people so I don’t know if this is a rare bug or what. Basically I have both games including the season pass for Tftb on my Xbox 360 and whenever I go to Shifty Sheldon in Concordia, the items come up in the menu but when I click A to redeem them in the bottom left corner it says “Content Not Found”, meaning that I can’t get the items. If anyone reading this has an idea as to why this may be happening please respond =3