Error(s) in re-building vignettes:
  ...
--- re-building ‘brms_customfamilies.Rmd’ using rmarkdown
--- finished re-building ‘brms_customfamilies.Rmd’

--- re-building ‘brms_distreg.Rmd’ using rmarkdown
--- finished re-building ‘brms_distreg.Rmd’

--- re-building ‘brms_families.Rmd’ using rmarkdown
--- finished re-building ‘brms_families.Rmd’

--- re-building ‘brms_missings.Rmd’ using rmarkdown
--- finished re-building ‘brms_missings.Rmd’

--- re-building ‘brms_monotonic.Rmd’ using rmarkdown
--- finished re-building ‘brms_monotonic.Rmd’

--- re-building ‘brms_multivariate.Rmd’ using rmarkdown
--- finished re-building ‘brms_multivariate.Rmd’

--- re-building ‘brms_nonlinear.Rmd’ using rmarkdown
--- finished re-building ‘brms_nonlinear.Rmd’

--- re-building ‘brms_phylogenetics.Rmd’ using rmarkdown
--- finished re-building ‘brms_phylogenetics.Rmd’

--- re-building ‘brms_threading.Rmd’ using rmarkdown
--- finished re-building ‘brms_threading.Rmd’

--- re-building ‘brms_multilevel.ltx’ using tex
Error: processing vignette 'brms_multilevel.ltx' failed with diagnostics:
Running ‘texi2dvi’ on ‘brms_multilevel.ltx’ failed.
LaTeX errors:
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.55 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.55 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.55 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.55 \begin{document}
                     
--- failed re-building ‘brms_multilevel.ltx’

--- re-building ‘brms_overview.ltx’ using tex
Error: processing vignette 'brms_overview.ltx' failed with diagnostics:
Running ‘texi2dvi’ on ‘brms_overview.ltx’ failed.
LaTeX errors:
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.54 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.54 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.54 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.54 \begin{document}
                     
--- failed re-building ‘brms_overview.ltx’

SUMMARY: processing the following files failed:
  ‘brms_multilevel.ltx’ ‘brms_overview.ltx’

Error: Vignette re-building failed.
Execution halted