Steam - Listen Server - UE 5.6 - Unable to Join

Development Programming & Scripting Multiplayer & Networking
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[2025.06.10-09.18.47:550][381]LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: , Name: IpConnection_2147482239, Driver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482302, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID, Channels: 3, Time: 2025.06.10-09.18.47
[2025.06.10-09.18.47:550][381]LogNet: UNetConnection::SendCloseReason:
[2025.06.10-09.18.47:550][381]LogNet:  - Result=AddressResolutionFailed, ErrorContext="AddressResolutionFailed"
[2025.06.10-09.18.47:550][381]LogNet: UChannel::Close: Sending CloseBunch. ChIndex == 0. Name: [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: , Name: IpConnection_2147482239, Driver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482302, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID
[2025.06.10-09.18.47:559][382]LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = PendingConnectionFailure, ErrorString = Your connection to the host has been lost., Driver = Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482302

TLDR - ERROR
ErrorString = Your connection to the host has been lost.
LogNet: - Result=AddressResolutionFailed, ErrorContext=“AddressResolutionFailed”

why cant i join from other device for testing?

hosting is successful but joining isnt working.
(Tried both manual code and Advanced Steam Sessions - Same Error)

2

Same issue here, can’t do anything
Happens to 2 different projects, one being almost empty? Looks like an issue on engine

1 Like
3

Fix is to turn on Steam Sockets plugin, the answer by @Ninhow here: