Command failed: latexmk -synctex=1 -interaction=nonstopmode -file-line-error -shell-escape -pdf main
Latexmk: This is Latexmk, John Collins, 19 Jan. 2017, version: 4.52c.
Rule 'pdflatex': File changes, etc:
   Changed files, or newly in use since previous run(s):
      'main.aux'
      'main.tex'
------------
Run number 1 of rule 'pdflatex'
------------
------------
Running 'pdflatex  -synctex=1 -interaction=nonstopmode -file-line-error -shell-escape -recorder  "main.tex"'
------------
===========Latexmk: Missing input file: 'main.gls' from line
  'No file main.gls.'
Latexmk: Missing input file: 'main.gls' from line
  'No file main.gls.'
Latexmk: Log file says output to 'main.pdf'
Latexmk: Found bibliography file(s) [bibliography/literature.bib]
Rule 'bibtex main': File changes, etc:
   Changed files, or newly in use since previous run(s):
      'main.aux'
------------
Run number 1 of rule 'bibtex main'
------------
------------
Running 'bibtex  "main"'
------------
Collected error summary (may duplicate other messages):
  bibtex main: Bibtex errors: See file 'main.blg'
Latexmk: Use the -f option to force complete processing,
 unless error was exceeding maximum runs of latex/pdflatex.