Blackscreen when running AR Foundation.

Make sure you have ARFoundation + ARCore (Android) or ARKit (iOS) imported in the Package Manager.
You also need to enable the XR Plug-in Providers in Project Settings > XR Plug-in Management.

The hand cutout is behind.

When the ManoMotionManager is set to run with multithreaded it doesn't wait for image processing to be done before the next frame.
To fix this disable runMultithreading on the ManoMotionManager component.
NOTE: This will make the application run a lot slower.