Hi All,  I'm running into the same issue as described HERE and felt it was worth creating a new topic.   In my case, I was stable on 4.7.0.7 and then began to experience the issue with the update to 4.7.0.9 -- and the corresponding mono6.8 upgrade.     InnerException: System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception. Source: mscorlib TargetSite: Void Throw() at Mono.Net.Security.MobileAuthenticatedStream.ProcessAuthenticat