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

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘fredr-categories.Rmd’ ‘fredr-releases.Rmd’ ‘fredr-series.Rmd’
  ‘fredr-sources.Rmd’ ‘fredr-tags.Rmd’ ‘fredr.Rmd’

Error: Vignette re-building failed.
Execution halted