CRAN issues with version 0.2.0

[teunbrand]

Dear reader,

It seems you have stumbled across this issue, wherein I ask for your help.
I find myself in the position that I want to submit the latest version of ggh4x to CRAN and have tried to do so.
If you are familiar with the warning issued by CRAN shown below and have (seen) a strategy that resolves this warning, do you mind pointing me in the right direction towards resolving this warning?

Thanks for any advice you can give!

Check: re-building of vignette outputs, Result: WARNING
  Error(s) in re-building vignettes:
  --- 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 31-39 (Facets.Rmd) 
  Error: processing vignette 'Facets.Rmd' failed with diagnostics:
  polygon edge not found
  --- failed re-building ‘Facets.Rmd’