Error(s) in re-building vignettes:
--- re-building ‘correlation-utils.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 ‘correlation-utils.Rmd’

--- re-building ‘covidcast.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
We encourage COVIDcast API users to register on our mailing list:
https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api
We'll send announcements about new data sources, package updates,
server maintenance, and new features.

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

Quitting from lines 88-90 (covidcast.Rmd) 
Error: processing vignette 'covidcast.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘covidcast.Rmd’

--- re-building ‘external-data.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 package: 'dplyr'

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

    filter, lag

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

    intersect, setdiff, setequal, union

We encourage COVIDcast API users to register on our mailing list:
https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api
We'll send announcements about new data sources, package updates,
server maintenance, and new features.
Quitting from lines 83-84 (external-data.Rmd) 
Error: processing vignette 'external-data.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘external-data.Rmd’

--- re-building ‘multi-signals.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
We encourage COVIDcast API users to register on our mailing list:
https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api
We'll send announcements about new data sources, package updates,
server maintenance, and new features.

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 ‘multi-signals.Rmd’

--- re-building ‘plotting-signals.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
We encourage COVIDcast API users to register on our mailing list:
https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api
We'll send announcements about new data sources, package updates,
server maintenance, and new features.
Quitting from lines 53-54 (plotting-signals.Rmd) 
Error: processing vignette 'plotting-signals.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘plotting-signals.Rmd’

SUMMARY: processing the following files failed:
  ‘covidcast.Rmd’ ‘external-data.Rmd’ ‘plotting-signals.Rmd’

Error: Vignette re-building failed.
Execution halted