I have heard of this issue when using Microsoft's new email login. Since I don't use that I never have this issue. Maybe that's a fix?
Upon INITIAL sign up, the password box is not active. It should be. To get around this problem, I'm forced to restart the system, after which, the password box is active, allowing me to enter the password. Somehow, Microsoft Windows 10 updates are creating this problem. The feature works properly, but after an update, the password box is deactivated. Solution might involve changing the password. Thanks for your anticipated help.