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

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

--- re-building ‘working_with_xts_timeseries.Rmd’ using rmarkdown
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

2635 observations did not overlap with the grid and will be discarded.
0.06 % of the visits spill over neighbouring grid cells.
Warning: timezone of object (UTC) is different than current timezone ().
Warning: timezone of object (UTC) is different than current timezone ().
Warning: timezone of object (UTC) is different than current timezone ().
Warning: timezone of object (UTC) is different than current timezone ().
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 'working_with_xts_timeseries.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘working_with_xts_timeseries.Rmd’

SUMMARY: processing the following files failed:
  ‘BIRDS.Rmd’ ‘technical_details.Rmd’ ‘working_with_xts_timeseries.Rmd’

Error: Vignette re-building failed.
Execution halted