This happens to me repeatedly. If I go to look at anyone's profile, too, including my own, I'm informed that I need to login, and when I do login, and try immediately thereafter even to edit my profile, I am given the same message. Also, when it gives me the security code to type in, it doesn't work the first time, and tells me that I've typed the code incorrectly even though it is correct. In other words, it works only after the second time. Would be really nice to have these problems remedied