After waiting for a month, and exchanging 4 Facebook messages, and 3 telephone calls, my problem has suddenly been fixed. I noticed the fix during a routine check midday on Wednesday, Oct. 28; then, I received Facebook notification of the fix on the morning of Thursday, Oct. 29.

I inquired via Facebook as to what actual problem had been repaired, but the Messenger staff had no specific answer. They declared that the Hertz IT team had corrected a few bugs this week, and that IT activity probably fixed my problem.