I have a server with windows server 2019.
When I install the server version (not the client) the service starts but is not recognized by Plex, instead of automatically opening the server interface I open the plex client interface and I cannot configure my plex server.
I did the test with a laptop with windows 10, and everything works correctly, only on my server with windows 2019 it does not work.
Keep in mind you need to connect to your new server/install locally / through the bundled version of Plex Web in order to complete the setup. This should bring up the setup wizard where you can name your server, link it to your account and create your first libraries.
If you’re on the same device, open http://127.0.0.1:32400/web in your browser – if you’re on a different device in the same network, open http://[PMS IP address]:32400/web instead.
Once the setup is complete and your new server is linked with your account, you can also open it from other clients or using the hosted version of Plex Web.