Error(s) in re-building vignettes:
--- re-building ‘apexcharter.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 36-39 (apexcharter.Rmd) 
Error: processing vignette 'apexcharter.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘apexcharter.Rmd’

--- re-building ‘chart-options.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 35-42 (chart-options.Rmd) 
Error: processing vignette 'chart-options.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘chart-options.Rmd’

--- re-building ‘facets.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 44-56 (facets.Rmd) 
Error: processing vignette 'facets.Rmd' failed with diagnostics:
'options' must be a fully named list, or have no names (NULL)
--- failed re-building ‘facets.Rmd’

--- re-building ‘shiny-integration.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 91-98 (shiny-integration.Rmd) 
Error: processing vignette 'shiny-integration.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘shiny-integration.Rmd’

--- re-building ‘spark-box.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 32-37 (spark-box.Rmd) 
Error: processing vignette 'spark-box.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘spark-box.Rmd’

--- re-building ‘sync-charts.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 62-63 (sync-charts.Rmd) 
Error: processing vignette 'sync-charts.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘sync-charts.Rmd’

SUMMARY: processing the following files failed:
  ‘apexcharter.Rmd’ ‘chart-options.Rmd’ ‘facets.Rmd’
  ‘shiny-integration.Rmd’ ‘spark-box.Rmd’ ‘sync-charts.Rmd’

Error: Vignette re-building failed.
Execution halted