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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘conditional_column.Rmd’ ‘examples.Rmd’ ‘make_css.Rmd’
  ‘tableHTML.Rmd’ ‘themes.Rmd’

Error: Vignette re-building failed.
Execution halted