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

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

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘box-elements.Rmd’ ‘boxPlus-sidebar.Rmd’ ‘css-preloader.Rmd’
  ‘extra-css-effects.Rmd’ ‘improved-boxes.Rmd’ ‘left-menu-navbar.Rmd’
  ‘rightSidebar.Rmd’

Error: Vignette re-building failed.
Execution halted