Getting 1-wire to work

I am trying to connect some DS18B20 temerature sensors to HA. I have the 1-wire network connected to a DS2490R plugged into my RPi4. I go to Settings, Add Integration, 1-Wire. It asks me for Server Details, Host (default localhost) and Port (default 4304). If I accept the defaults it says Failed to Connect. What is the server that it is asking for details of? What do I enter on this page?

Thank you - Rowan