VR Expansion Plugin

No it didn’t, if it says


LogOnline:Display: STEAM: Loading Steam SDK 1.39
LogOnline:Warning: STEAM: Steam API disabled!
LogOnline:Display: STEAM: OnlineSubsystemSteam::Shutdown()

that means that the online subsystem didn’t load at all and it reverted back to subsystem NULL / LAN.

If you are packaging in shipping then it will fail without the appid.txt file. If you are packaging in development then it “IS” the SteamVRHome being enabled as it currently appears to conflict with the OnlineSubsystemSteam in engine and the Steam Subsystem doesn’t load anymore when it is enabled.