Cant connect to friends room

[Kaihua123123]

I cant join to my friends room, says that unable to join to the room, we have upnp connected, added as friends and still doesnt work, pls help

[Dss0]

Kaihua123123 the host can try forwarding port 4976 and 3074 udp (https://www.lifewire.com/how-to-port-forward-4163829)