Cannot access Halo 4 stats app

Games Other Halo
1

Whenever I try to launch the Halo 4 stats app on any device, I get the same message:

HALO 4 STATS APP PROBLEM
HALO 4 STATS IS HAVING TROUBLE, PLEASE TRY AGAIN LATER

Below that it gives me an error code that changes very time I try to launch it.

2

Could you state the following:

Device:
Browser:

It’d help the team out hugely.