Bjoernovico

Hi guys, I have a big problem with multiplayer in grounded on my Win 7 pc. I can start the game and play as SP, but if I log ingame in my Xbox Live account, it always tells everything is fine, but afterwards im always a "OfflineUser" and cant play MP. I tried many many solutions and nothing works for me, even the tipps with steam cloud deactivating and so on. Because of Win 7 I even cant use the Xbox app on Pc to play as online. Is there anyone who can help me please? Would be great.. Greetings