Error(s) in re-building vignettes:
--- re-building 'browseMovebank.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
--- finished re-building 'browseMovebank.Rmd'

--- re-building 'move.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Loading required package: geosphere
Loading required package: sp
Loading required package: raster
Loading required package: rgdal
rgdal: version: 1.4-8, (SVN revision 845)
 Geospatial Data Abstraction Library extensions to R successfully loaded
 Loaded GDAL runtime: GDAL 2.2.3, released 2017/11/20
 Path to GDAL shared files: D:/temp/RtmpaqqCSs/RLIBS_22b40746f32a3/rgdal/gdal
 GDAL binary built with GEOS: TRUE 
 Loaded PROJ.4 runtime: Rel. 4.9.3, 15 August 2016, [PJ_VERSION: 493]
 Path to PROJ.4 shared files: D:/temp/RtmpaqqCSs/RLIBS_22b40746f32a3/rgdal/proj
 Linking to sp version: 1.4-1 

Attaching package: 'lubridate'

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

    date

Google's Terms of Service: https://cloud.google.com/maps-platform/terms/.
Please cite ggmap if you use it! See citation("ggmap") for details.
Loading required package: mapproj
Loading required package: maps
Checking rgeos availability: FALSE
 	Note: when rgeos is not available, polygon geometry 	computations in maptools depend on gpclib,
 	which has a restricted licence. It is disabled by default;
 	to enable gpclib, type gpclibPermit()
Computational size: 7.3e+07
Quitting from lines 494-495 (move.Rmd) 
Error: processing vignette 'move.Rmd' failed with diagnostics:
cannot coerce type 'S4' to vector of type 'double'
--- failed re-building 'move.Rmd'

SUMMARY: processing the following file failed:
  'move.Rmd'

Error: Vignette re-building failed.
Execution halted