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

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

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

--- re-building ‘r2estimates.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 'r2estimates.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘r2estimates.Rmd’

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

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

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

SUMMARY: processing the following files failed:
  ‘bdformats.Rmd’ ‘geneticfileinfo.Rmd’ ‘mergingfiles.Rmd’
  ‘r2estimates.Rmd’ ‘usingbdfiles.Rmd’ ‘usinggenfiles.Rmd’
  ‘usingvcffiles.Rmd’

Error: Vignette re-building failed.
Execution halted