Error(s) in re-building vignettes:
--- re-building ‘DIF_vignette.Rmd’ using rmarkdown

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

no column `person_id` provided, automatically generating unique person id's
Fontconfig warning: "/Library/Frameworks/R.framework/Resources/fontconfig/fonts/fonts.conf", line 86: unknown element "blank"
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 'DIF_vignette.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘DIF_vignette.Rmd’

--- re-building ‘Dexter.Rmd’ using rmarkdown

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Fontconfig warning: "/Library/Frameworks/R.framework/Resources/fontconfig/fonts/fonts.conf", line 86: unknown element "blank"
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 'Dexter.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Dexter.Rmd’

--- re-building ‘Equating.Rmd’ using rmarkdown
Fontconfig warning: "/Library/Frameworks/R.framework/Resources/fontconfig/fonts/fonts.conf", line 86: unknown element "blank"
no column `person_id` provided, automatically generating unique person id's
no column `person_id` provided, automatically generating unique person id's
no column `person_id` provided, automatically generating unique person id's
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 'Equating.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Equating.Rmd’

--- re-building ‘Plausible_Values.Rmd’ using rmarkdown
Fontconfig warning: "/Library/Frameworks/R.framework/Resources/fontconfig/fonts/fonts.conf", line 86: unknown element "blank"
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 'Plausible_Values.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Plausible_Values.Rmd’

--- re-building ‘Profile-plots.Rmd’ using rmarkdown
no column `person_id` provided, automatically generating unique person id's
Fontconfig warning: "/Library/Frameworks/R.framework/Resources/fontconfig/fonts/fonts.conf", line 86: unknown element "blank"
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 'Profile-plots.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Profile-plots.Rmd’

--- re-building ‘Test_Individual_differences.Rmd’ using rmarkdown
Fontconfig warning: "/Library/Frameworks/R.framework/Resources/fontconfig/fonts/fonts.conf", line 86: unknown element "blank"
no column `person_id` provided, automatically generating unique person id's
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 'Test_Individual_differences.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Test_Individual_differences.Rmd’

SUMMARY: processing the following files failed:
  ‘DIF_vignette.Rmd’ ‘Dexter.Rmd’ ‘Equating.Rmd’ ‘Plausible_Values.Rmd’
  ‘Profile-plots.Rmd’ ‘Test_Individual_differences.Rmd’

Error: Vignette re-building failed.
Execution halted