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

--- re-building ‘node-edge-data-frames.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 'node-edge-data-frames.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘node-edge-data-frames.Rmd’

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

--- re-building ‘simple-graphs-ndfs-edfs.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 'simple-graphs-ndfs-edfs.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘simple-graphs-ndfs-edfs.Rmd’

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

SUMMARY: processing the following files failed:
  ‘graphviz-mermaid.Rmd’ ‘node-edge-data-frames.Rmd’ ‘selections.Rmd’
  ‘simple-graphs-ndfs-edfs.Rmd’ ‘traversals.Rmd’

Error: Vignette re-building failed.
Execution halted