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

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

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

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

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

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

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

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

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

SUMMARY: processing the following files failed:
  ‘creating_estimators.Rmd’ ‘dataset_api.Rmd’ ‘estimator_basics.Rmd’
  ‘feature_columns.Rmd’ ‘input_functions.Rmd’ ‘parsing_spec.Rmd’
  ‘run_hooks.Rmd’ ‘tensorboard.Rmd’ ‘tensorflow_layers.Rmd’

Error: Vignette re-building failed.
Execution halted