Error ID 12072 The WSUS content directory is not accessible.

Hi,

I receive the following error log.

The WSUS content directory is not accessible.
System.Net.WebException: The remote server returned an error: (401) Unauthorized.
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.CheckContentDirWebAccess(EventLoggingType type, HealthEventLogger logger)

Also WSUS server doesn't install any approved update that "Installed/Not Applicable Percentage"column is still 0% and message says,

"This update supersedes another update. Before you decline any superseded update, we recommend that you verify it is no longer needed by any computer. To do so, approve the superseding update first."

Does this have anything to do with error 12072?

Could you please give me some advise?

Thanks,