Error(s) in re-building vignettes:
--- re-building ‘charting-data-frames.Rmd’ using rmarkdown
Highcharts (www.highcharts.com) is a Highsoft software product which is
not free for commercial and Governmental use

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'charting-data-frames.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘charting-data-frames.Rmd’

--- re-building ‘charting-maps.Rmd’ using rmarkdown
Highcharts (www.highcharts.com) is a Highsoft software product which is
not free for commercial and Governmental use
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'charting-maps.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘charting-maps.Rmd’

--- re-building ‘replicating-highcharts-demos.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'replicating-highcharts-demos.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘replicating-highcharts-demos.Rmd’

--- re-building ‘shiny-events-demo.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'shiny-events-demo.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘shiny-events-demo.Rmd’

SUMMARY: processing the following files failed:
  ‘charting-data-frames.Rmd’ ‘charting-maps.Rmd’
  ‘replicating-highcharts-demos.Rmd’ ‘shiny-events-demo.Rmd’

Error: Vignette re-building failed.
Execution halted