Problems with multiplayer

yo guys , have a question. I logged on Halo 5 just to play multiplayer then it says profile. Sync error, then when I try to play arena it takes ages and keeps saying retrieving data. My internet works fine, any solutions and btw have been playing since yesterday. Thanks

It’s failing to do anything for me right now, I can’t even look at my Req Packs. People on the Halo SubReddit are also reporting the same issues.