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

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

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘blocksrecs.Rmd’ ‘cdata.Rmd’ ‘control_table_keys.Rmd’ ‘design.Rmd’
  ‘exercises.Rmd’ ‘general_transform.Rmd’ ‘operators.Rmd’

Error: Vignette re-building failed.
Execution halted