@brysondev said:
For anyone else who found this thread and needed an answer, disable teredo/IPV6 in windows settings.
Win+R -> Type: "services.msc" -> Locate "IP Helper" service -> Right Click -> Stop
i know for sure my router has local network level NAT, disabling ipv6 via stopping this service worked,
worth also trying to turn it off from the network interface settings on windows, maybe the game's networking process binds directly to the network interface and accidently binds to an unsupported ipv6 interface ip