\documentclass{ltjsarticle}
\begin{document}
あいうえお
\end{document}
上のソースのコンパイルを
(1) lualatex foo とすると正しく処理されますが，
(2) luajitlatex foo とすると，以下のエラーが出ます．
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> luajitlatex foo
This is LuajitTeX, Version 1.11.1 (TeX Live 2019/W32TeX)
system commands enabled.
(./foo.tex
LaTeX2e <2018-12-01>
luaotfload | load : FATAL ERROR
luaotfload | load : ﾃ・Failed to load module "luaotfload-database.lua".
luaotfload | load : ﾃ・Error message:
luaotfload | load : ﾃ・"...texmf-dist/tex/luatex/luaotfload/luaotfload-database.lua:174: attempt to index global 'utf8' (a nil value)".
stack traceback:
...are/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua:171: in function 'loadmodule'
...are/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua:237: in function 'initialize'
...are/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua:289: in function 'main'
[\directlua]:1: in main chunk
---------------------------------------------------------------------
対処方法よろしくお願いします．