The Vive Input Utility project validation tool can put Unity into a bad state that causes crashes when play mode is entered. XR Plugin management does not allow multiple loaders to be enabled. If a user already has the Oculus plugin enabled, and then accepts the Recommended Project settings from the Vive Input Utility, the user can now enable multiple loaders simultaneously.

Bad state:

Workaround:
Users can get around this issue by going to XR Project Management and ensuring only one loader is checked.