NetScaler - Error "Registration of device failed" when adding license server.

After recently deploying and registering a NetScaler Console formerly ADM Agent and trying to add it as a license server on a NetScaler device you get the error "Registration of device failed Sending request to mgmtserver failed"...

OnPrem | CVAD 1912 upgrade throws an error "The license server doesn't support the hosting network"

During CVAD upgrade from 1912 version to 2203 CU3 version, we receive the error "The license server doesn't support the hosting network" and upgrade fails...

Error "Citrix License Server unavailable. Check the License Server to Make Sure It Is Running"

When setting up XenDesktop 7.1 or higher, the licensing node displays the following error message, "Citrix License Server unavailable. Check the license server to make sure it is running." Reference Screenshot:...