Biblatex missing characters in Libertinus

[Herbert Voss]

Wolfgang Engelmann schrieb:
>
>
>>>>>
>>>>>> \usepackage{libertinus}
>>>>>> \setmathfont{STIX2Math.otf}
>>>>>>
>> luaotfload | db : Reload initiated (formats: otf,ttf,ttc); reason: File
>> not foun
>> d: "STIX2Math.otf".
>> ! Package fontspec Error: The font "STIX2Math" cannot be found.
>>
>> I tried also /etc/environment.d
>> but I do not understand its functioning and stopped it

for font files in official directories you do not need
any path setting. Try the attaches minimal example. It works
under Ubuntu and TeXLive

Herbert
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