Problem with last Halo5 update "Infinity’s Armory"

Hello!

After the last Halo 5 update “Infinity Armory”, we have lost all our datas : levels, armor, helmet …

And when we try to connect to the multiplayer mode, an error message is displayed and it’s something like “unknown identification profile” (I’m trying to translate from a french message into english and it could be a bad translation…)

Of course, we are connected on the Xbox live Gold.

Does anyone have ever had the same problem ? If Yes, do you know how to fix it ?

Thanks for your help