SteamVR broken in Unity 5.6.1?

I just updated Unity to the latest release (5.6.1f1), and when I try to play my scene, the camera doesn’t track with my headset, and I see an error in the Console: Failed to load IVRRenderModels interface version IVRRenderModels_005

Is anybody else having this problem?

I just updated and my Google vr project has all kind of errors.