I was able to get the demo project working with 4.26 today. It was doing the same thing some some other people reported where you can see your hands moving but can’t start the calibration. I looked at BP_PlayerCharacter and BP_PlayerPawn and noticed that all the input events had warnings. I added new input actions and axis bindings for my Valve Index controllers and changed the blueprints to use those instead of the MotionController ones. After doing that it seems to work fine. I’m still pretty new to Unreal so this might not be the best way. Just thought that might be helpful to someone.