Settings -> Bibliography: no access to biblatex

[Jürgen Spitzmüller]

Am Dienstag, dem 13.06.2023 um 09:27 -0700 schrieb Rich Shepard:
> Installed are lyx-2.3.6.1-x86_64-1_SBo and TexLive2023.
> 
> Configuring a new book document using the memoir class the
> bibliography dialog box has made all biblatex choices unavailable
> (see attached screen shot.) Why? How do I fix this issue?

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

-- 
Jürgen