Error(s) in re-building vignettes:
--- re-building ‘localMethods.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Loading required package: plotly
Loading required package: ggplot2

Attaching package: 'plotly'

The following object is masked from 'package:ggplot2':

    last_plot

The following object is masked from 'package:stats':

    filter

The following object is masked from 'package:graphics':

    layout

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.
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 43-46 (localMethods.Rmd) 
Error: processing vignette 'localMethods.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘localMethods.Rmd’

--- re-building ‘splineML.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Loading required package: plotly
Loading required package: ggplot2

Attaching package: 'plotly'

The following object is masked from 'package:ggplot2':

    last_plot

The following object is masked from 'package:stats':

    filter

The following object is masked from 'package:graphics':

    layout

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.
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 43-46 (splineML.Rmd) 
Error: processing vignette 'splineML.Rmd' failed with diagnostics:
invalid 'path' argument
--- failed re-building ‘splineML.Rmd’

SUMMARY: processing the following files failed:
  ‘localMethods.Rmd’ ‘splineML.Rmd’

Error: Vignette re-building failed.
Execution halted