Error(s) in re-building vignettes:
  ...
--- re-building ‘ddid2.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in panelize.data(data, idname, tname, t, tmin1) :
  dropping 2675 observations that are not in period: 1978, 1975, ...
Warning in panel.checks(qp) :
  covariates appear to vary over time...
  only conditioning on first period covariates...
  this is recommended practice, but worth noting...
--- finished re-building ‘ddid2.Rmd’

--- re-building ‘panel-qtet.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in panel.checks(qp) :
  covariates appear to vary over time...
  only conditioning on first period covariates...
  this is recommended practice, but worth noting...
Warning in panel.checks(qp) :
  covariates appear to vary over time...
  only conditioning on first period covariates...
  this is recommended practice, but worth noting...
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
Warning in rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
--- finished re-building ‘panel-qtet.Rmd’

--- re-building ‘R-QTEsWrapper.Rnw’ using Sweave
Error: processing vignette 'R-QTEsWrapper.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'R-QTEsWrapper.tex' failed.
LaTeX errors:
! Argument of \@tempa has an extra }.
<inserted text> 
                \par 
l.8 ...ludepdf[pages=-, fitpaper=true]{R-QTEs.pdf}
                                                  
! Paragraph ended before \@tempa was complete.
<to be read again> 
                   \par 
l.8 ...ludepdf[pages=-, fitpaper=true]{R-QTEs.pdf}
                                                  
! Extra }, or forgotten \endgroup.
<recently read> }
                 
l.8 ...ludepdf[pages=-, fitpaper=true]{R-QTEs.pdf}
                                                  
! Undefined control sequence.
\AM@getpagecount ...ource {\AM@currentdocname@fix 
                                                  }\edef \AM@pagecount {\the...
l.8 ...ludepdf[pages=-, fitpaper=true]{R-QTEs.pdf}
                                                  
!pdfTeX error: pdflatex (file /usr/local/texlive/2019/texmf-dist/tex/latex/tool
s/.tex): unknown type of image
 ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘R-QTEsWrapper.Rnw’

SUMMARY: processing the following file failed:
  ‘R-QTEsWrapper.Rnw’

Error: Vignette re-building failed.
Execution halted