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

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

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

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

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

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

--- re-building ‘ml10m.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 'ml10m.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘ml10m.Rmd’

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘cmabs.Rmd’ ‘cmabsoffline.Rmd’ ‘eckles_kaptein.Rmd’
  ‘epsilongreedy.Rmd’ ‘introduction.Rmd’ ‘mabs.Rmd’ ‘ml10m.Rmd’
  ‘offline_depaul_movies.Rmd’ ‘replication.Rmd’ ‘simpsons.Rmd’
  ‘sutton_barto.Rmd’ ‘website_optimization.Rmd’

Error: Vignette re-building failed.
Execution halted