That indicates a problem syncing... Which I'm sure you know.
Some solutions would be to check your date and time to make sure they are accurate. If you are having data connection problems might be another issue. Also, it may be a server side issue where all you can do is wait for them to fix it on their end.
More details might help us give a more focused solution.
If you need additional help or have more questions or details to share, please join the site so you can reply in this thread...