First step is to verify if the service is running. Enter services in the Windows search bar, open the Services app and check that Roon Extension Manager is in the list and running.
If it is, then you might check your firewall settings. Enter firewall in the Windows search bar, open the Windows Defender Firewall app, select “Allow an app or feurure…” (at the left) and check that Node.js has been enabled for the private network.
