This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.7000 64-bit) (preloaded format=pdflatex 2019.3.24)  30 MAR 2019 23:04
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**./detaljer.tex
(detaljer.tex
LaTeX2e <2018-12-01>
! Undefined control sequence.
l.1 \chapter
            {Trista saker}\label{cha:boring}
? 

! LaTeX Error: Missing \begin{document}.

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 ...                                              
                                                  
l.1 \chapter{T
              rista saker}\label{cha:boring}
? 
! Emergency stop.
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l.1 \chapter{T
              rista saker}\label{cha:boring}
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Here is how much of TeX's memory you used:
 8 strings out of 492945
 339 string characters out of 3135507
 57009 words of memory out of 3000000
 4005 multiletter control sequences out of 15000+200000
 3640 words of font info for 14 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 5i,0n,4p,58b,16s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!