What is your platform? The only message send by the system that I think about is "More than one account detected."
Have you seen this particular message at any point?
I'm on Xbox One - the message comes when you attempt the change, new password and confirmation and current password and then press ok and gives the problem message. If I alter something to be incorrect it states password/email is incorrect. But when I do it right it says the problem.
And no not seen that message 🙂
Maybe you just have to set-up a security question and answer.
I think this is the reason why there is an error message especially if you haven't logged into your account in some time.
