The latest update from Meta link today fixes this, you can tryOculus Link Black Screen When Launching VaM in Oculus Mode (Quest 3)
Oculus Link connects, but the PC‑VR runtime does not start properly, the desktop cannot be opened, and VaM in Oculus mode only shows a black screen.
- This seems to be a known issue with Meta Horizon Link, please tell if you have the same issue or if you know how to solve the problem.