Biblatex missing characters in Libertinus

[Wolfgang Engelmann]

Am 03.12.21 um 12:11 schrieb Kees Zeelenberg (kzStats):
>> -----Oorspronkelijk bericht-----
>> Van: lyx-users <lyx-users-bounces at lists.lyx.org> Namens Wolfgang Engelmann
>> Verzonden: vrijdag 3 december 2021 11:13
>> Aan: lyx-users at lists.lyx.org
>> Onderwerp: Re: Biblatex missing characters in Libertinus
>>
>> Ups,
>> here the log file, the first one was empty.
>> Wolfgang
> 
> The latest stix2fonts seem to be called STIXTwo....otf, so with "Two" instead of "2", and have suffixes (Regular, etc).  With \setmathfont{STIXTwoMath-Regular.otf} in the preamble, the LyX-file compiles well and shows the correct pdf output, whereas with \setmathfont{STIX2Math.otf} it fails.
> 
> Kees
> 
> 
It is now better working after changing to STIXTwoMath-Regular.otf
\usepackage{libertinus}
%\setmathfont{STIX2Math.otf}
\setmathfont{STIXTwoMath-Regular.otf}

I added also
\setmathfont{STIXTwoMath-Italic.otf}

There is an error
no (U+009C) In Libertinus Serif-Regular.otf
and
no (U+1D446) In [STIXTwo-Italic.otf]:m

There is another error:
  Taken verbatim from babel files (2019/09/27 v3.34)

This error is a problem for me:
I don't know were Polyglossia was loaded after biblatex. I don't have it 
in the Document>settings>Latex Preamble.


Package polyglossia Info: Making " an active character on input line 177.
)
Package csquotes Info: Checking for multilingual support...
Package csquotes Info: ... found 'polyglossia' package.

! Package biblatex Error: 'polyglossia' loaded after biblatex.

See the biblatex package documentation for explanation

At least I am getting now a pdf with>
Show Output Anyway
But the Bibliograpy is not shown and the references in the text are all 
in Bold
I set Bibliography in TOC, which does not show up.

Wolfgang