You need to make sure your VR headset is connected to your PC and that OpenXR compatible drivers are running.
For example: if you use SteamVR, make sure you have it running before starting the game.
Ohhhh okay, that makes a lot of sense, I deeply appreciate the reply 😅
still don't work for me
If you're on Windows MR's OpenXR Runtime, it doesn't have Vulcan support. Try making sure your OpenXR Runtime is set to SteamVR (SteamVR settings -> OpenXR).
