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

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

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

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

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

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

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

--- re-building ‘santaR-GUI.pdf.asis’ using asis
--- finished re-building ‘santaR-GUI.pdf.asis’

SUMMARY: processing the following files failed:
  ‘advanced-command-line-functions.Rmd’ ‘automated-command-line.Rmd’
  ‘getting-started.Rmd’ ‘plotting-options.Rmd’ ‘prepare-input-data.Rmd’
  ‘selecting-optimal-df.Rmd’ ‘theoretical-background.Rmd’

Error: Vignette re-building failed.
Execution halted