Oculus error and black screen

Hello. I've recently been trying to create an Oculus demo with Unity 5.6. It was working for a while, but now when I play the demo I get a warning (InitD3D11RenderColorSurface: VRDevice said it created a texture, but the texture is NULL. VR platform drivers may be running with elevated privileges.) that repeats 6 times with a black gameplay window and a black screen in the Oculus. I've been searching, but the only answers I've found are to restart the editor or edit the ProjectSettings asset file (both of which I have tried). Does anyone have and answer or an idea of where to start looking for this error? Thanks very much!

 

I just started getting the same error...

 

Getting it also.. But not using any VR stuff.