Error(s) in re-building vignettes:
  ...
--- re-building ‘Deployment.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.
--- finished re-building ‘Deployment.Rmd’

--- re-building ‘Estimation.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.
--- finished re-building ‘Estimation.Rmd’

--- re-building ‘Language.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.
--- finished re-building ‘Language.Rmd’

--- re-building ‘NCA.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.
PhantomJS not found. You can install it with webshot::install_phantomjs(). If it is installed, please make sure the phantomjs executable can be found via the PATH variable.
Quitting from lines 195-196 (NCA.Rmd) 
Error: processing vignette 'NCA.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘NCA.Rmd’

--- re-building ‘Reporting.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.
--- finished re-building ‘Reporting.Rmd’

--- re-building ‘Simulation.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.
Loading required package: ubiquity
Loading required package: deSolve
Loading required package: ggplot2
Loading required package: foreach
Loading required package: doParallel
Loading required package: iterators
Loading required package: parallel
Loading required package: rhandsontable
PhantomJS not found. You can install it with webshot::install_phantomjs(). If it is installed, please make sure the phantomjs executable can be found via the PATH variable.
Quitting from lines 95-97 (Simulation.Rmd) 
Error: processing vignette 'Simulation.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘Simulation.Rmd’

--- re-building ‘Titration.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.
PhantomJS not found. You can install it with webshot::install_phantomjs(). If it is installed, please make sure the phantomjs executable can be found via the PATH variable.
Quitting from lines 278-279 (Titration.Rmd) 
Error: processing vignette 'Titration.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘Titration.Rmd’

SUMMARY: processing the following files failed:
  ‘NCA.Rmd’ ‘Simulation.Rmd’ ‘Titration.Rmd’

Error: Vignette re-building failed.
Execution halted