Lone wolf achievement not unlocking

Games Halo 5: Guardians
1

I finished the campaign on legendary yesterday but do not have the achievement.

2

According to your service record, Guardians has not yet been completed on Legendary.

3

> 2533274796457055;2:
> According to your service record, Guardians has not yet been completed on Legendary.

https://xboxclips.co/a8460/086b5909-1ed2-4cc9-85cf-eb07f56658c0

4

Nevermind I got the achievement