Unable to create session in packaged game (Works in Editor) with Steam Advanced Sessions Online Subsystem

Hi! Really appreciate both of your help with solving this issue.
I tried @BRGEzedeRocco’s suggestion which somehow still wouldnt let me create session.
I then tried using @chrudimer’s suggestion, removing steamsocket plugin and using your config modifications, helped fix my create session issue. However, I can’t seem to join my friend through invite nor through find and join session.

I am using unreal engine 5.6, could that be the problem? this is the (important parts of the) log I got upon attempting to join through steam (note that we are both in the same steam download region)


LogSockets: Warning: GetAddressInfo failed to resolve host with error SE_HOST_NOT_FOUND [11001]

LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: , Name: IpConnection_[censoring the numbers], Driver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_[censoring the numbers], IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID, Channels: 3, Time: 2025.07.15-23.12.42

LogNet: - Result=AddressResolutionFailed, ErrorContext=“AddressResolutionFailed”

LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = PendingConnectionFailure, ErrorString = Your connection to the host has been lost., Driver = Name:PendingNetDriver Def:GameNetDriver IpNetDriver_[censoring the numbers]

LogNet: Warning: Network Failure: PendingNetDriver[PendingConnectionFailure]: Your connection to the host has been lost.