Error(s) in re-building vignettes:
--- re-building ‘application.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 'application.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘application.Rmd’

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

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

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

SUMMARY: processing the following files failed:
  ‘application.Rmd’ ‘article.Rmd’ ‘simulation.Rmd’ ‘vignette.Rmd’

Error: Vignette re-building failed.
Execution halted