Error(s) in re-building vignettes:
--- re-building ‘continuous.Rmd’ using rmarkdown
Loading required package: sp
Loading required package: viridisLite

Attaching package: 'data.table'

The following object is masked from 'package:raster':

    shift


Attaching package: 'dplyr'

The following objects are masked from 'package:data.table':

    between, first, last

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

    intersect, select, union

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

    filter, lag

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

    intersect, setdiff, setequal, union

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

--- re-building ‘discrete.Rmd’ using rmarkdown
Loading required package: viridisLite

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

Warning: Removed 3 rows containing missing values (geom_text).

Attaching package: 'dplyr'

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

    as_data_frame, groups, union

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

    filter, lag

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

    intersect, setdiff, setequal, union

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

--- re-building ‘none.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 'none.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘none.Rmd’

--- re-building ‘nosoi.Rmd’ using rmarkdown
Loading required package: viridisLite

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

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

--- re-building ‘output.Rmd’ using rmarkdown
Loading required package: data.table
Starting the simulation
Initializing ... running ...
Time: 10 (10% of maximum length). Hosts count: 13 (6% of maximum infected hosts).
Time: 20 (20% of maximum length). Hosts count: 88 (44% of maximum infected hosts).
Time: 30 (30% of maximum length). Hosts count: 120 (60% of maximum infected hosts).
Time: 40 (40% of maximum length). Hosts count: 171 (86% of maximum infected hosts).
done. 
The simulation has run for 46 units of time and a total of 204 hosts have been infected.
`stat_bin()` using `bins = 30`. Pick better value with `binwidth`.
Packages 'ape', 'tidytree' and 'treeio' are needed for transmission tree generation.
Packages 'ggplot2' and 'ggtree' are needed for plotting this figure.
Packages 'ape', 'tidytree' and 'treeio' are needed for transmission tree generation.
Packages 'ape', 'tidytree' and 'treeio' are needed for transmission tree generation.
Package 'ggtree' is needed for plotting this figure.
Packages 'ape', 'tidytree' and 'treeio' are needed for transmission tree generation.
Packages 'ape', 'tidytree' and 'treeio' are needed for transmission tree generation.
Packages 'ape', 'tidytree', 'treeio' and 'ggtree' are needed for transmission tree generation.
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 'output.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘output.Rmd’

SUMMARY: processing the following files failed:
  ‘continuous.Rmd’ ‘discrete.Rmd’ ‘none.Rmd’ ‘nosoi.Rmd’ ‘output.Rmd’

Error: Vignette re-building failed.
Execution halted