lualatex with MikTex: bad argument #2 to 'gsub'

[BernhardBecker]

`Module lyluatex Info: Compiling score tmp-ly/504130eafb16e7b481f300c28c1a5064 wi
th LilyPond executable 'c:/Program Files (x86)/LilyPond/usr/bin/lilypond.exe'. o
n input line 21
...Data/Local/Programs/MiKTeX/scripts/lyluatex/lyluatex.lua:119: bad argument #2
to 'gsub' (string/function/table expected)
stack traceback:
[C]: in function 'string.gsub'
...Data/Local/Programs/MiKTeX/scripts/lyluatex/lyluatex.lua:119: in upvalue 'ex
tract_includepaths'
...Data/Local/Programs/MiKTeX/scripts/lyluatex/lyluatex.lua:816: in method 'lil
ypond_cmd'
...Data/Local/Programs/MiKTeX/scripts/lyluatex/lyluatex.lua:1151: in method 'ru
n_lilypond'
...Data/Local/Programs/MiKTeX/scripts/lyluatex/lyluatex.lua:1115: in method 'pr
ocess'
[\directlua]:1: in main chunk.
\ly@compilescore ...directlua {ly.score:process()}

l.21 \end{lilypond}`

A full description is written on
https://tex.stackexchange.com/questions/727209/lylualatex-lilypond-error-when-compiling-with-miktex