The Render Server update on 12.0 minor will begin running as a Windows Service. As such, this article will be covered for you.

How to Update?

Firstly, check to see your Render Server Controller version if it's updated to the Legacy Version (2131.8):

There is a prompt at the bottom asking if you want to update the Service Version (2131.107), where it will be installed alongside the Legacy Version.
This is so that users can still choose to use the Legacy Version if the Service Version has unforeseen issues.

After it's updated to the Service Version, it should now look like this:

Since it's now a Service, it requires elevated permissions to edit the fields.

Blocked by Firewall

Usage of the Render Server could be blocked if a Firewall blocks the connection.

The installer adds an exception in the Windows Firewall for the Render Server by default.
However, if you use another firewall, incoming and outgoing traffic might be blocked.

• If both incoming and outgoing are blocked, the resources will not be visible in the RenderAccelerator on another machine.
• If only incoming is blocked, the Render Accelerator will detect the resource, but it will be marked offline.

In these cases, the only fix is to add an exception to the used firewall.