We haven’t had any other reports that the system is down and it seems to be working as normal for us, but there was a recent website update and sometimes a browser can cache old versions of the site and cause things not to work. So please could you try visiting 11plus.co.uk and then do a ‘hard refresh’ (ctrl+F5 on windows OR ⌘ Cmd and ⇧ Shift and R on mac). This will force your browser to download the latest version of our online system.
Then try to log in to your parent/student account again and see if the problem you described is still happening.