This is a Regression.
4.26.2 - Binary - no issue creating a session.
4.27.1 - Binary - no issue creating a session if you convert a previously working 4.26.2 project.
4.27.1 - Binary - Fails to create session with LogOnlineSession: Warning: STEAM: Failed to initialize game server with Steam!
//UE4/Release-4.27 CL18325204 - p4v - Fails to create session with LogOnlineSession: Warning: STEAM: Failed to initialize game server with Steam!
Steam sessions are failing to create when using the Create Session Node.
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver") [OnlineSubsystem] DefaultPlatformService=Steam bHasVoiceEnabled=false [OnlineSubsystemSteam] bEnabled=true SteamDevAppId=480 [/Script/OnlineSubsystemSteam.SteamNetDriver] NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection"
Expected Results:
Game launches and after a few seconds displays "Session Created"
Actual Results:
"Session Failed to Create" displays with
LogOnlineSession: Warning: STEAM: Failed to initialize game server with Steam!
in the logs.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-136316 in the post.