I’m seeing the same thing. I’m creating a steam session on one PC, then print out all the session settings. I see that bUsesPresence = true and bUseLobbiesIfAvailable = true. Then on another PC I search and find the session, noting that bUseLobbiesIfAvailable has now become false for some reason. I’ll never be able to join the session because of that conflict and get that same error message over and over.
“LogOnlineSession: Warning: STEAM: [FOnlineSessionSteam::JoinSession] The values of FOnlineSessionSettings::bUsesPresence and FOnlineSessionSettings::bUseLobbiesIfAvailable are treated as equal and have to match”