Error(s) in re-building vignettes:
--- re-building ‘plotting_functions.Rmd’ using rmarkdown
trying URL 'https://www.imbi.uni-freiburg.de/imbi/Royston-Sauerbrei-book/Multivariable_Model-building/downloads/datasets/adv_prostate_ca.zip'
Content type 'application/zip' length 62590 bytes (61 KB)
==================================================
downloaded 61 KB

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

--- re-building ‘subbuild_function.Rmd’ using rmarkdown
trying URL 'https://www.imbi.uni-freiburg.de/imbi/Royston-Sauerbrei-book/Multivariable_Model-building/downloads/datasets/adv_prostate_ca.zip'
Content type 'application/zip' length 62590 bytes (61 KB)
==================================================
downloaded 61 KB

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

--- re-building ‘subtee_package.Rmd’ using rmarkdown
trying URL 'https://www.imbi.uni-freiburg.de/imbi/Royston-Sauerbrei-book/Multivariable_Model-building/downloads/datasets/adv_prostate_ca.zip'
Content type 'application/zip' length 62590 bytes (61 KB)
==================================================
downloaded 61 KB

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

SUMMARY: processing the following files failed:
  ‘plotting_functions.Rmd’ ‘subbuild_function.Rmd’ ‘subtee_package.Rmd’

Error: Vignette re-building failed.
Execution halted