After 4.23 update, project won't launch on Quest

I updated our Unreal engine to 4.23 last week, the Oculus version on Github, and everything seems to run OK on Windows.  But I tried to run it today on the Quest, and I just see the three loading dots on a black screen forever.   Packing succeeds and the install seems to work OK.  I don't know how to figure out what the problem is.  I tried 'adb logcat' but I'm not sure how to use that to locate the problem.  Anyone have a suggestion for what could be the problem?