xrCreateSession returning XR_ERROR_RUNTIME_FAILURE for Windows Mixed Reality

I am having an issue creating a session when the Windows Mixed Reality runtime is set, trying to create a session returns XR_ERROR_RUNTIME_FAILURE.

If I switch to SteamVR as the OpenXR runtime creating the session works.

The really odd behavior here is that both my own code and the OpenXR Explorer get this runtime failure message, the Microsoft provided OpenXR Developer Tools for Windows Mixed Reality Demo Scene loads and play correctly.

I am cross posting this issue from:

as I think this may be a better place to discuss the problem. Unless there is a Microsoft specific forum for discussing issues with their OpenXR runtime.

Thanks.