How to implement Precomputed Visibility in the right way

I’m having trouble with implementing Precomputed Visibility under my GearVR and HTC VIVE built,
It always comes to a “NO PRECOMPUTED VISIBILITY” warning.(UE4.14)

Before building,
PrecomputedVisibilityVolume was set up, enable was checked under World Settings/Precomputed Visibility.
I was not using other cull like CullDistanceVolume or StreamLevel.

Is there anything I missed ?