Start only one window in Unreal and start the host. Check the logs to see if it has been started and see if port 8000 is open in the resource monitor.
And are you sure that the IPs are correct? Try ipv4 127.0.0.1 and ipv6 0:0:0:0:0:0:0:0:1.
Start only one window in Unreal and start the host. Check the logs to see if it has been started and see if port 8000 is open in the resource monitor.
And are you sure that the IPs are correct? Try ipv4 127.0.0.1 and ipv6 0:0:0:0:0:0:0:0:1.