I have finally got this working. Because of Unity 6 the minimum server requirement is MS Server.....
Windows 10 version 21H1 (build 19043) or newer, running on workstation and rack form factors, without emulation or compatibility layer
so this is also the NEW minimum server version requirement to run RW server after the season update. I managed to get a copy of windows server 2019 which runs nicely on an old Dell optiplex 390. This version runs RW server without having to install any service pack updates.