@loomie: Nevermind. Fixed. Just restarted my computer about 10 times

I need help. Everytime I start Battle.net it just displays this:

I tried restarting my computer but nothing changed.

@kane_1371: Thanks!

@Black_Knight_00 Hello, I can't find a game. It's a parkour / grappling hook game where you grapple on small floating rocks onto other islands. I don't know anything else but I have a background gameplay of a video. It's at 13:13. I don't know what game that is..