请问 Failed to load IVRRenderModels interface这个怎么解决呢

2017版本的unity，连接vive，显示不了手柄，出现Failed to load IVRRenderModels interface version IVRRenderModels_005 的错误
Assertion failed: Assertion failed on expression: 'IsMatrixValid(matrix)'
Failed to load IVRRenderModels interface version IVRRenderModels_005
UnityEngine.Debug:LogError(Object)
RenderModelInterfaceHolder:get_instance() (at Assets/SteamVR/Scripts/SteamVR_RenderModel.cs:90)
SteamVR_RenderModel:SetModel(String) (at Assets/SteamVR/Scripts/SteamVR_RenderModel.cs:281)
SteamVR_RenderModel:Update() (at Assets/SteamVR/Scripts/SteamVR_RenderModel.cs:674)
Request error (error):
UnityEditor.AsyncHTTPClient:Done(State, Int32)