SOLVED: Windows Server Update Services WSUS SYNCRONIZATION DETAILS, RESULT: THE ERROR TYPE IS UNKNOWN

There are several solutions to the error below, but in my case the issue was resolved after a simple WSUS > OPTIONS > SERVER CLEANUP.  This was odd because I run the Server Cleanup Wizard with regularity.

SYNCRONIZATION DETAILS > RESULT: THE ERROR TYPE IS UNKNOWN

TypeInitializationException: The type initializer for ‘Microsoft.UpdateServices.ServerSyncWebServices.ServerSync.ServerSyncProxy’ threw an exception. —> System.Net.WebException: Unable to connect to the remote server
at Microsoft.UpdateServices.Internal.ClassFactory.CreateInstance(Type type, Object[] args)
   at Microsoft.UpdateServices.ServerSync.ServerSyncLib.GetWebServiceProxyInternal(UpdateServerConfiguration serverConfig, WebServiceCommunicationHelper webServiceHelper, Boolean useCompressionProxy)
   at Microsoft.UpdateServices.ServerSync.ServerSyncLib.GetWebServiceCompressionProxy(UpdateServerConfiguration serverConfig, WebServiceCommunicationHelper webServiceHelper)
   at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.RetrieveSubscriptionData()
   at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.ExecuteSyncProtocol(Boolean allowRedirect)

In my case I restarted four services:

1. WSusCertServer
2. Update Services
3. Software Protection (which turns back off after a short while)
4. I then did an IIS RESET (I could have just restarted the WORLD WIDE WEB PUBLISHING SERVICE) but still had the error, so after some digging through blogs,

Note that I found a number of references to patch KB2720211 breaking WSUS sync, but this was not my issue.