How to add Map/Gamemode screenshot thumbnail?

Games Halo 5: Guardians
1

How do I add a thumbnail for a map/gamemode?
I thought it might have been “Link Screenshots.” Yet, every time I do that, I get errors. What to do?

2

I thought it was “link screenshots.” You may just be experiencing a bug.

3

> 2535455681930574;2:
> I thought it was “link screenshots.” You may just be experiencing a bug.

IS there a place to submit a report, that may or may not be looked into?

4

> 2533274856011418;3:
> > 2535455681930574;2:
> > I thought it was “link screenshots.” You may just be experiencing a bug.
>
> IS there a place to submit a report, that may or may not be looked into?

I have no idea.

5

I go to link screenshots and my new screenshots have not been showing up for around two weeks. (they show up in my profile, just don’t show when I go to link them)