The authentification phase is blocked, and the host and all the connected players are kicked from the creation process.

So, it's currently impossible to create a game.

Deux hours after I signaled this general problem, the problem has been resolved by itself.

This is the first time I saw that.

The bug came back.

Authentification phase is blocked. Impossible to play any game.

Could be of your interest, too.

http://steamcommunity.com/app/289130/discussions/0/133256758575375016/

Personally I suspect starting open beta of "For Honor" to be reasonable for (started yesterday at 15:00h europe time).