rooijen@sagittarius ~/LaTeX $ latex test
This is pdfTeX, Version 3.141592653-2.6-1.40.24 (TeX Live 2022) (preloaded format=latex)
 restricted \write18 enabled.
entering extended mode
(./test.tex
LaTeX2e <2022-11-01> patch level 1
L3 programming layer <2022-12-17>
(/usr/local/texlive/2022/texmf-dist/tex/latex/ntgclass/artikel3.cls
Document Class: artikel3 2023-01-10 v2.1f NTG LaTeX document class
(/usr/local/texlive/2022/texmf-dist/tex/latex/ntgclass/ntg11.clo))
(/usr/local/texlive/2022/texmf-dist/tex/latex/url/url.sty)
(/usr/local/texlive/2022/texmf-dist/tex/latex/tools/varioref.sty)
(/usr/local/texlive/2022/texmf-dist/tex/generic/babel/babel.sty
(/usr/local/texlive/2022/texmf-dist/tex/generic/babel/txtbabel.def)
(/usr/local/texlive/2022/texmf-dist/tex/generic/babel-dutch/dutch.ldf

Package babel Warning: No hyphenation patterns were preloaded for
(babel)                the language 'Dutch' into the format.
(babel)                Please, configure your TeX system to add them and
(babel)                rebuild the format. Now I will use the patterns
(babel)                preloaded for \language=0 instead on input line 49.

) (/usr/local/texlive/2022/texmf-dist/tex/generic/babel-english/english.ldf))
(/usr/local/texlive/2022/texmf-dist/tex/generic/babel/locale/en/babel-english.t
ex)
(/usr/local/texlive/2022/texmf-dist/tex/generic/babel/locale/nl/babel-dutch.tex
) (/usr/local/texlive/2022/texmf-dist/tex/latex/l3backend/l3backend-dvips.def)
No file test.aux.
No file test.toc.
[1]
! Missing number, treated as zero.
<to be read again>
                   \scan_stop:
l.14 \subsection
                {\'Sriipati (1019-1066)}
?

Groeten,

Wilfred