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

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘a_start_here.Rmd’ ‘b_document_clustering.Rmd’ ‘c_topic_modeling.Rmd’
  ‘d_text_embeddings.Rmd’ ‘e_doc_summarization.Rmd’
  ‘f_tidytext_example.Rmd’

Error: Vignette re-building failed.
Execution halted