Okey, I think it's an link issue.
I played around, and figured out that when linking the site to Keon, the link is unique per browser. So if I made a link on Chrome, everything worked while using Chrome, but after switching go Firefox, I would need to create the link again.
So I believe the same issue might be happening in HereSphere? As in, when switching to API Mode, a new link should be made again uniquely for that "browser", but there's no way to do that in the API Mode.
If that's not the case then I am lost