This is a rare error. Sometimes it is related to your local connection and sometimes it can be caused by an issue with the EdReady servers.
Please take the initial step of clearing your browser's cache and cookies "for all time" then try to access the site again.
If that does not resolve the issue, please report this to our technical staff so we can investigate.
Use the "Submit a Support Ticket" link at the top right of this page or the "Help" button at the bottom to contact us.