Error(s) in re-building vignettes:
--- re-building ‘DecisionNetworks.Rmd’ using rmarkdown
Loading required package: nnet
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 'DecisionNetworks.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘DecisionNetworks.Rmd’

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

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

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

SUMMARY: processing the following files failed:
  ‘DecisionNetworks.Rmd’ ‘GettingStartedWithHydeNet.Rmd’
  ‘HydeNetPlots.Rmd’ ‘WorkingWithHydeNetObjects.Rmd’

Error: Vignette re-building failed.
Execution halted