Error(s) in re-building vignettes:
  ...
--- re-building ‘p1_getting_started.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.

Attaching package: 'dplyr'

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

    filter, lag

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

    intersect, setdiff, setequal, union


Attaching package: 'amt'

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

    filter

.t missing, creating `track_xy`.
Quitting from lines 165-166 (p1_getting_started.Rmd) 
Error: processing vignette 'p1_getting_started.Rmd' failed with diagnostics:
error in evaluating the argument 'obj' in selecting a method for function 'coordinates': is.character(proj) is not TRUE
--- failed re-building ‘p1_getting_started.Rmd’

--- re-building ‘p3_rsf.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.

Attaching package: 'amt'

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

    filter

--- finished re-building ‘p3_rsf.Rmd’

--- re-building ‘p4_SSF.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.

Attaching package: 'lubridate'

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

    date, intersect, setdiff, union

Loading required package: sp

Attaching package: 'amt'

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

    bbox, select

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

    bbox

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

    filter

--- finished re-building ‘p4_SSF.Rmd’

--- re-building ‘p5_other_packages.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.

Attaching package: 'amt'

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

    filter

Warning in wkt(obj) : CRS object has no comment
Warning in wkt(CRS(tg)) : CRS object has no comment
Quitting from lines 44-46 (p5_other_packages.Rmd) 
Error: processing vignette 'p5_other_packages.Rmd' failed with diagnostics:
error in evaluating the argument 'obj' in selecting a method for function 'coordinates': is.character(proj) is not TRUE
--- failed re-building ‘p5_other_packages.Rmd’

SUMMARY: processing the following files failed:
  ‘p1_getting_started.Rmd’ ‘p5_other_packages.Rmd’

Error: Vignette re-building failed.
Execution halted