Error(s) in re-building vignettes:
--- re-building ‘Data_processing.Rmd’ using rmarkdown
tcpl (v2.0.2) loaded with the following settings:
  TCPL_DB:    /Volumes/Builds/packages/high-sierra-x86_64/results/4.0/tcpl.Rcheck/tcpl/csv
  TCPL_USER:  NA
  TCPL_HOST:  NA
  TCPL_DRVR:  tcplLite
Default settings stored in tcpl config file. See ?tcplConf for more information.
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 'Data_processing.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Data_processing.Rmd’

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

--- re-building ‘Introduction_Appendices.Rmd’ using rmarkdown
tcpl (v2.0.2) loaded with the following settings:
  TCPL_DB:    /Volumes/Builds/packages/high-sierra-x86_64/results/4.0/tcpl.Rcheck/tcpl/csv
  TCPL_USER:  NA
  TCPL_HOST:  NA
  TCPL_DRVR:  tcplLite
Default settings stored in tcpl config file. See ?tcplConf for more information.
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_Appendices.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Introduction_Appendices.Rmd’

SUMMARY: processing the following files failed:
  ‘Data_processing.Rmd’ ‘Data_retrieval.Rmd’
  ‘Introduction_Appendices.Rmd’

Error: Vignette re-building failed.
Execution halted