I installed spartan strike on my new windows 10 laptop (hp Spectre 360) worked fine for a few day. last night when I start the game, I get the error "WARNING Can't sign in . Try signing in at Xbox.com, then start the app" I am signed in and still can not sign in . Please help. I spent 4 hours with Xbox support chat with no result. I have uninstalled and installed the app at least 10 times. I have returned the app and purchased again - still no luck.