我问过类似的问题别处，但是现在我已经解决了我的问题的 MWE，并且已经安装Santakku.ttf在我的系统上。
MWE 是这里我仍然收到的错误是：
(d:/BitDownlD/texlive/2023/texmf-dist/tex/latex/base/fontenc.sty
Package: fontenc 2021/04/29 v2.0v Standard LaTeX package
)
(d:/BitDownlD/texlive/2023/texmf-dist/tex/latex/fontspec/fontspec.cfg)))
! Package fontspec Error: The font "Santakku" cannot be found.
For immediate help type H <return>.
...
l.6 \DeclareTextFontCommand
{\textcuneiform}{\cuneiform}
? ^^Z
Type <return> to proceed, S to scroll future error messages,
R to run without stopping, Q to run quietly,
I to insert something, E to edit your file,
1 or ... or 9 to ignore the next 1 to 9 tokens of input,
H for help, X to quit.
?
! Emergency stop.
...
l.6 \DeclareTextFontCommand
{\textcuneiform}{\cuneiform}
A font might not be found for many reasons.
Check the spelling, where the font is installed etc. etc.
When in doubt, ask someone for help!