It was this answer that I reviewed as 'Looks OK' but was judged as incorrectly handled. https://superuser.com/review/first-answers/1113523
The comment pointed out that the answer was covered in the accepted answer, but MacOS 10.11 was not covered in the accepted answer.
The comment also pointed out that it is a duplicate of an existing answer among unaccepted ones, but it was very hard for me to detect when I carefully reviewed the question, the accepted answer, and the answer of interest.
So I wonder if the ban can be lifted.