Since some update (see edit), I have not been able to compile files containing Japanese text using the yu-win10 preset provided by luatexja-preset under Windows 10.
However, if I compile the same code using an identical TeXLive installation under the Ubuntu 20.04 subsystem for Windows 10 (with access to Windows' fonts), everything runs perfectly fine.
I have tested this on different machines, and the result is always the same. (Other font presets like haranoaji work with both systems.)
\documentclass{article}
\usepackage[yu-win10,deluxe]{luatexja-preset}
\begin{document}
\section{A Section}
Some meaningless text.
\section{次のセクション}
意味のないテキスト。
\end{document}
Running this with TeXLive under Windows 10 yields the following error:
But letting the Ubuntu subsystem handle things works:
For some time keeping older versions of luatexja, fontspec, and luaotfload worked as well, but after incompatibilities with other packages kept piling up, I have been using the subsystem for Japanese documents until now - hoping for an update. As I am switching to a new computer, I was hoping to solve this issue, eliminating the need for two TeXLive installations...
Since compiling with Windows takes quite long before producing that error message, I am guessing LuaLaTeX gets stuck in a loop somewhere until it crashes. Does anyone have an idea what the issue might be and how to solve it?
Edit:
These are the backup files of the last release numbers where everything worked fine under Windows:





