Error: "Error Id: XDDS:F05685F3" Connection To Existing License Server Fails After License Server Upgrade to 11.11.1 v2

Connection to existing production license server XenDesktop 7.5 fails after License Server upgrade to 11.11.1. New XenDesktop 7.5 environment. Upgraded existing license server to 11.11.1 build 13017 Current XenApp 6.5 environment continued to function New DDC is fails to connect to the license...