Unity 2018.2.0f2 error VR

,

I try SteamVR asset in Unity 2018.2.0f2 and doesn’t work:

Assembly has reference to non-existent assembly ‘Unity.XR.OpenVR’ (Assets/SteamVR/Input/Editor/SteamVR_Input_Editor.asmdef)

How can i resolve this?
Thanks

I think the answer is to use a newer version of Unity.