LaTeX.org

Thanks for your quick reply. The TexMFLocal version shows
\ProvidesPackage{hyperref}
[2001/10/11 v6.71r
Hypertext links for LaTeX]
and the Program Files version shows
\ProvidesPackage{hyperref}
[2022-11-13 v7.00u %
Hypertext links for LaTeX]

So, I can see that the TexMFLocal version is a ...

I have a LaTex document (several, actually) that ran beautifully six years ago but fails now.
Below is a short document that generates the error (which is not particularly helpful; see 5 below).

QUESTION: what do I do to cure the "Undefined control sequence"?

Thanks.
\date{May 2017 ...