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I found this question and still asking this again since I have clicked 'logout' button properly.(Two times, on top once and then the logout button appeared after this). After all these, I just clicked in the text box for openid, then It showed that I have logged in again. I am using chrome and it was in incognito mode. I cleared the cookies in content settings once.(But I don't see a reason for doing that since the message shows that your local settings will be cleared).
I tried 2 or 3 times and got this. And once I got the error saying this is our fault it is not you message.