Comment 5 for bug 570980

Hello uniomni,
This bug report has been marked as Expired and your cause may be different. In any case please check whether your system clock is running properly and if not, install and run ntpdate command -
sudo ntpdate pool.ntp.org
You may want to stop ntpd service if it is already running before running ntpdate.
Additionally please try re-authorizing Ubuntu One by following the steps mentioned in https://one.ubuntu.com/help/faq/what-should-i-do-if-authentication-fails-auth_failed-state/