No problems here, Carlos, using XeTeX rather than XeLaTeX
\font \Jost = "Jost*"
\Jost Hallo
\end
This is XeTeX, Version 3.14159265-2.6-0.999992 (TeX Live 2020/W32TeX)
(preloaded format=xetex)
\write18 enabled.
entering extended mode
(./untitled-1.tex [1] )
Output written on untitled-1.pdf (1 page).
SyncTeX written on untitled-1.synctex.gz.
Transcript written on untitled-1.log.
It may therefore be that the problem lies with "fontspec" or with the
XeLaTeX format.
/Philip Taylor/
--------
Carlos Franke wrote:
Hello!
I'm having trouble using the typeface Jost* [0] [1] with xelatex.