Error(s) in re-building vignettes:
--- re-building ‘inventoryAttributes.Rmd’ using rmarkdown
ForestTools 0.2.0 backwards compability warning: see NEWS file
Loading required package: sp
rgeos version: 0.5-2, (SVN revision 621)
 GEOS runtime version: 3.7.2-CAPI-1.11.2 
 Linking to sp version: 1.4-1 
 Polygon checking: TRUE 

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 'inventoryAttributes.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘inventoryAttributes.Rmd’

--- re-building ‘polygonalCrownMaps.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 'polygonalCrownMaps.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘polygonalCrownMaps.Rmd’

--- re-building ‘treetopAnalysis.Rmd’ using rmarkdown
ForestTools 0.2.0 backwards compability warning: see NEWS file
Loading required package: sp
rgeos version: 0.5-2, (SVN revision 621)
 GEOS runtime version: 3.7.2-CAPI-1.11.2 
 Linking to sp version: 1.4-1 
 Polygon checking: TRUE 

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 'treetopAnalysis.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘treetopAnalysis.Rmd’

SUMMARY: processing the following files failed:
  ‘inventoryAttributes.Rmd’ ‘polygonalCrownMaps.Rmd’
  ‘treetopAnalysis.Rmd’

Error: Vignette re-building failed.
Execution halted