Error(s) in re-building vignettes:
--- re-building ‘FileIO.Rmd’ using rmarkdown
Loading required package: stringr
Loading required package: hash
hash-2.2.6.1 provided by Decision Patterns

Loading required package: grid
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 'FileIO.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘FileIO.Rmd’

--- re-building ‘neuroim.Rmd’ using rmarkdown
Loading required package: stringr
Loading required package: hash
hash-2.2.6.1 provided by Decision Patterns

Loading required package: grid
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 'neuroim.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘neuroim.Rmd’

--- re-building ‘regionOfInterest.Rmd’ using rmarkdown
Loading required package: stringr
Loading required package: hash
hash-2.2.6.1 provided by Decision Patterns

Loading required package: grid
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 'regionOfInterest.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘regionOfInterest.Rmd’

SUMMARY: processing the following files failed:
  ‘FileIO.Rmd’ ‘neuroim.Rmd’ ‘regionOfInterest.Rmd’

Error: Vignette re-building failed.
Execution halted