This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016) (preloaded format=pdflatex 2017.1.6)  24 MAR 2019 20:15
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**/Users/hilda/Projekte/ct2019/mobility/website/call.html
(/Users/hilda/Projekte/ct2019/mobility/website/call.html
LaTeX2e <2016/03/31>
Babel <3.9r> and hyphenation patterns for 83 language(s) loaded.

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.1 <
     !doctype html>
? 
! Emergency stop.
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l.1 <
     !doctype html>
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

 
Here is how much of TeX's memory you used:
 8 strings out of 493014
 391 string characters out of 6133352
 53601 words of memory out of 5000000
 3648 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 5i,0n,4p,73b,14s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!