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

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

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

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

SUMMARY: processing the following files failed:
  ‘boxr-app-interactive.Rmd’ ‘boxr-app-service.Rmd’ ‘boxr-apps.Rmd’
  ‘boxr.Rmd’

Error: Vignette re-building failed.
Execution halted