No dialogue in campaign, please help

Finally picked up Halo 5 yesterday, but I haven’t been able to enjoy the campaign so far because of some audio issue.

In campain I can’t hear any dialogue (even though I know somebody is talking since I have subs on).

From what I can find online, more people had this problem and what fixed it for them was changing the language on their xbox to Englisch which would then prompt them with a message saying they had to download a language pack for Halo 5 (1 Gb big).
Thing is, I already had my console set to English.

Nevertheless, I changed my console back to Dutch (since I live in the Netherlands), didn’t work. Changed it back to Englisch, didn’t work.

I have an xbox one S and the Halo 5 total file is 96,4 Gb for anyone interested.

Can anyone help me with this problem?

If not, I’m throwing away the disc. Been a Halo player since the original Halo came out and I just want to play the Halo 5 campaign and then go back to Halo 2 and 3, but I just can’t enjoy the campaign this way sorry.

Hey Bob, I had this same Infuriating issue, I managed to fix it by setting my Xbox language and region to United States English and re-installed the game (took me two Damn days)
But it DID WORK after this !