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

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

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘arrays.Rmd’ ‘calling_python.Rmd’ ‘package.Rmd’
  ‘python_dependencies.Rmd’ ‘python_packages.Rmd’ ‘r_markdown.Rmd’
  ‘versions.Rmd’

Error: Vignette re-building failed.
Execution halted