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

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

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

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

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

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

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

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

--- re-building ‘brms_multilevel.ltx’ using tex
--- finished re-building ‘brms_multilevel.ltx’

--- re-building ‘brms_overview.ltx’ using tex
--- finished re-building ‘brms_overview.ltx’

SUMMARY: processing the following files failed:
  ‘brms_customfamilies.Rmd’ ‘brms_distreg.Rmd’ ‘brms_families.Rmd’
  ‘brms_missings.Rmd’ ‘brms_monotonic.Rmd’ ‘brms_multivariate.Rmd’
  ‘brms_nonlinear.Rmd’ ‘brms_phylogenetics.Rmd’

Error: Vignette re-building failed.
Execution halted