Worked for me, too. Thanks! 
The problem appeared from nowhere. I was launching ok (to Meta Quest2), and 10 minutes later, I coudn’t launch.
Also, if I chose to package the project and upload it to the Quest, I did not get an error, but the app oppened full black in an infinite waiting loop.
But deleting the directory as explained above worked.
Someone even made a video on Youtube, referencing to this page and showing the process.
Also there is this forum post reaching to the same conclusion
ERROR: System.ArgumentException: Attempt to construct staged filesystem reference from absolute path - #7 by rasamaya>