Settings -> Bibliography: no access to biblatex

[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?

TIA,

Rich
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