No DLC is working on HALO WARS 2 Ultimate Edition

Gamer Tag: Kyain 01
A while back, when Awakening the Nightmare DLC came out, I noticed that my Season Pass didn’t give me access to that DLC. I figured that it wasn’t a part of the Season Pass and bought it. (I really wanted to play it.) After I finished it, I tried to play some the other games like Blitz and noticed some of the leaders were not available to play as. I didn’t really think anything of it. There were other games I could play. 2 days ago, My XBOX ONE X home menu gave me a notice that I was close to earning an achievement with one of the DLC leaders. I started up the game and noticed none of the DLC were working. I went into the game manager, everything was installed. I went back into the game and it was still not working. I moved everything from the external to the onboard storage. Still nothing. I uninstalled and reinstalled. Still nothing. I uninstalled then installed from the store. Still nothing. What can I do? I can’t find where I can update or redownload my Season Pass.

Please Help.