TeX Live 2019로 업데이트하니까 Noto Serif KR를 LuaLaTeX에서 부를 수가 없습니다. 

아래 코드는 XeLaTeX에서는 작동하는데, LuaLaTeX에서는 애러를 뱉네요. 

게다가 더 이상한 건 Noto Sans KR, Noto Serif JP는 두 엔진에서 모두 작동합니다. 

동작 환경은 Windows 10이고, 폰트는 여기서 다운로드하였습니다. 

https://github．com/googlefonts/noto-cjk

-----------------------------------------------------------
\documentclass{article}
\usepackage{fontspec}

\begin{document}
\setmainfont{Noto Serif KR}
안녕하세요
\end{document}
-----------------------------------------------------------
This is LuaTeX, Version 1.10.0 (TeX Live 2019/W32TeX) 
 restricted system commands enabled.
(./hunmin.tex
LaTeX2e <2018-12-01>

luaotfload | main : initialization completed in 0.141 seconds
(c:/texlive/2019/texmf-dist/tex/latex/base/article.cls
Document Class: article 2018/09/03 v1.4i Standard LaTeX document class
(c:/texlive/2019/texmf-dist/tex/latex/base/size10.clo))
(c:/texlive/2019/texmf-dist/tex/latex/fontspec/fontspec.sty
(c:/texlive/2019/texmf-dist/tex/latex/l3packages/xparse/xparse.sty
(c:/texlive/2019/texmf-dist/tex/latex/l3kernel/expl3.sty
(c:/texlive/2019/texmf-dist/tex/latex/l3kernel/expl3-code.tex)
(c:/texlive/2019/texmf-dist/tex/latex/l3kernel/l3pdfmode．def)))
(c:/texlive/2019/texmf-dist/tex/latex/fontspec/fontspec-luatex.sty
(c:/texlive/2019/texmf-dist/tex/latex/base/fontenc.sty
(c:/texlive/2019/texmf-dist/tex/latex/base/tuenc．def))
(c:/texlive/2019/texmf-dist/tex/latex/fontspec/fontspec.cfg))) (./hunmin.aux)

! Package fontspec Error: The font "NotoSerifKR" cannot be found.

For immediate help type H <return>.
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