Settings -> Bibliography: no access to biblatex

[Rich Shepard]

On Sat, 17 Jun 2023, Jürgen Spitzmüller wrote:

> Do you have a module loaded or something in Local Layout?

Jürgen,

No, I don't. The issue has been resolved by my creating a new document
(KOMA-Script book class) and inserting the text file converted from the
problem file's PDF. Biblatex and biber are the defaults in the new document.

Thank you very much,

Rich