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

--- re-building ‘latent_class_model_with_hlme.Rmd’ using rmarkdown
Loading required package: survival
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 'latent_class_model_with_hlme.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘latent_class_model_with_hlme.Rmd’

--- re-building ‘latent_process_model_with_lcmm.Rmd’ using rmarkdown
[WARNING] Could not parse YAML metadata at line 16 column 1: Unexpected '
  '
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 'latent_process_model_with_lcmm.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘latent_process_model_with_lcmm.Rmd’

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

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

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

SUMMARY: processing the following files failed:
  ‘introduction.Rmd’ ‘latent_class_model_with_hlme.Rmd’
  ‘latent_process_model_with_lcmm.Rmd’
  ‘latent_process_model_with_multlcmm.Rmd’ ‘pre_normalizing.Rmd’
  ‘usual_problems.Rmd’

Error: Vignette re-building failed.
Execution halted