Error(s) in re-building vignettes:
--- re-building ‘about_spip.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘about_spip.Rmd’

--- re-building ‘simple-example-with-migration.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
── Attaching packages ─────────────────────────────────────── tidyverse 1.3.1 ──
✔ ggplot2 3.3.5     ✔ purrr   0.3.4
✔ tibble  3.1.3     ✔ dplyr   1.0.7
✔ tidyr   1.1.3     ✔ stringr 1.4.0
✔ readr   2.0.0     ✔ forcats 0.5.1
── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
Using stored package data because spip is not installed
Quitting from lines 154-155 (simple-example-with-migration.Rmd) 
Error: processing vignette 'simple-example-with-migration.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘simple-example-with-migration.Rmd’

--- re-building ‘species_1_simulation.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
── Attaching packages ─────────────────────────────────────── tidyverse 1.3.1 ──
✔ ggplot2 3.3.5     ✔ purrr   0.3.4
✔ tibble  3.1.3     ✔ dplyr   1.0.7
✔ tidyr   1.1.3     ✔ stringr 1.4.0
✔ readr   2.0.0     ✔ forcats 0.5.1
── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
Using stored package data because spip is not installed
Quitting from lines 172-173 (species_1_simulation.Rmd) 
Error: processing vignette 'species_1_simulation.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘species_1_simulation.Rmd’

SUMMARY: processing the following files failed:
  ‘simple-example-with-migration.Rmd’ ‘species_1_simulation.Rmd’

Error: Vignette re-building failed.
Execution halted