Error(s) in re-building vignettes:
  ...
--- re-building ‘multifile_zip_resources.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.
Quitting from lines 23-30 (multifile_zip_resources.Rmd) 
Error: processing vignette 'multifile_zip_resources.Rmd' failed with diagnostics:
`resource` must be a 1 row data frame or a length 1 character vector.
--- failed re-building ‘multifile_zip_resources.Rmd’

--- re-building ‘multiple_resources_purrr.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.
--- finished re-building ‘multiple_resources_purrr.Rmd’

--- re-building ‘multisheet_resources.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.
New names:
* `` -> ...2
* `` -> ...3
* `` -> ...4
* `` -> ...5
* `` -> ...6
* … and 30 more problems

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

New names:
* `` -> ...1
* `` -> ...2
* `` -> ...4
* `` -> ...5
* `` -> ...6
* … and 79 more problems
New names:
* `` -> ...1
* `` -> ...2
* `` -> ...4
* `` -> ...5
* `` -> ...6
* … and 33 more problems
--- finished re-building ‘multisheet_resources.Rmd’

--- re-building ‘opendatatoronto.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.
--- finished re-building ‘opendatatoronto.Rmd’

--- re-building ‘spatial_data.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

--- finished re-building ‘spatial_data.Rmd’

SUMMARY: processing the following file failed:
  ‘multifile_zip_resources.Rmd’

Error: Vignette re-building failed.
Execution halted