Citrix ShareFile – SAML Authentication Error after upgrading to NetScaler v11 and Unified Gateway – http/1.1 Service Unavailable

Citrix ShareFile – SAML Authentication Error after upgrading to NetScaler v11 and Unified Gateway – http/1.1 Service Unavailable

After upgrading my existing and fully functional NetScaler v10.5 Build 57.7 to the latest v11.0 Build 55.23 and implementing Unified Gateway for XenMobile and XenDesktop, my users were unable to SAML authenticate with ShareFile, i.e. by using their MDX wrapped