This is due to a failure to establish a connection to the checking service host, or the update could not be found.

Check your internet connection

Check if you can view web pages, for example www.google.com If you can't, please contact your local IT support. 

Check the Auto Update Service is available

Visit trust.sage.com, If there are issues with the service, please wait until these are resolved then retry the update.

Using a proxy server?

If you're using a proxy server, confirm that your proxy settings are in place.