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

--- re-building ‘epiphy.Rmd’ using rmarkdown
Warning in chisq.test2(freq$observed, freq$random, n_est = n_est[["random"]],  :
  Chi-squared approximation may be incorrect.
Warning in chisq.test2(freq$observed, freq$aggregated, n_est = n_est[["aggregated"]],  :
  Chi-squared approximation may be incorrect.
Warning in chisq.test2(freq$observed, freq$random, n_est = n_est[["random"]],  :
  Chi-squared approximation may be incorrect.
Warning in chisq.test2(freq$observed, freq$aggregated, n_est = n_est[["aggregated"]],  :
  Chi-squared approximation may be incorrect.
Warning in chisq.test2(freq$observed, freq$random, n_est = n_est[["random"]],  :
  Chi-squared approximation may be incorrect.
Warning in chisq.test2(freq$observed, freq$aggregated, n_est = n_est[["aggregated"]],  :
  Chi-squared approximation may be incorrect.
Warning in clump.intensity(., unit_size = c(x = 3, y = 3)) :
  To get even clumps of individuals, a total of 54 source sampling units were dropped.
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 'epiphy.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘epiphy.Rmd’

SUMMARY: processing the following files failed:
  ‘defs-and-eqns.Rmd’ ‘epiphy.Rmd’

Error: Vignette re-building failed.
Execution halted