Session ID expected. Most likely causes: Pressing the back button, clicking a URL that launched a new web browser, using a non-official client, or a bad or incorrectly configured web proxy. If you clicked a URL in an e-mail, it opened a new web browser, and you got this error, then try this solution: Copy the URL and paste it into the address bar of the other web browser. Sorry for the inconvenience, but this behavior helps keep your account secure from hackers.