This is pdfTeX, Version 3.141592653-2.6-1.40.24 (MiKTeX 22.3) (preloaded format=pdflatex 2022.4.16)  16 MAY 2022 20:27
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**./main.tex
(main.tex
LaTeX2e <2021-11-15> patch level 1
L3 programming layer <2022-02-24>
! Undefined control sequence.
l.6 \chapter
            {Thema\label{chapter:nav}}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.


! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.6 \chapter{T
              hema\label{chapter:nav}}
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

Missing character: There is no T in font nullfont!
Missing character: There is no h in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no m in font nullfont!
Missing character: There is no a in font nullfont!
! Undefined control sequence.
l.7 \lhead
          {Thema}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

Missing character: There is no T in font nullfont!
Missing character: There is no h in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no m in font nullfont!
Missing character: There is no a in font nullfont!

! LaTeX Error: Environment refsection undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.8 \begin{refsection}
                      
Your command was ignored.
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.

! Undefined control sequence.
l.9 \chapterauthor
                  {Hans Muster}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

Missing character: There is no H in font nullfont!
Missing character: There is no a in font nullfont!
Missing character: There is no n in font nullfont!
Missing character: There is no s in font nullfont!
Missing character: There is no M in font nullfont!
Missing character: There is no u in font nullfont!
Missing character: There is no s in font nullfont!
Missing character: There is no t in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no r in font nullfont!

Overfull \hbox (20.0pt too wide) in paragraph at lines 6--10
[][]
 []


! LaTeX Error: File `papers/nav/einleitung.tex' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: tex)

Enter file name: 
! Emergency stop.
<read *> 
         
l.13 \input{papers/nav/einleitung.tex}
                                      ^^M
*** (cannot \read from terminal in nonstop modes)

 
Here is how much of TeX's memory you used:
 22 strings out of 478582
 530 string characters out of 2856069
 288951 words of memory out of 3000000
 18307 multiletter control sequences out of 15000+600000
 469259 words of font info for 28 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 16i,0n,26p,84b,28s stack positions out of 10000i,1000n,20000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!