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

--- re-building ‘convenience-features.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 ‘convenience-features.Rmd’

--- re-building ‘custom-group-by.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 ‘custom-group-by.Rmd’

--- re-building ‘data-table-syntax.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.
prtconf: devinfo facility not available
Quitting from lines 44-52 (data-table-syntax.Rmd) 
Error: processing vignette 'data-table-syntax.Rmd' failed with diagnostics:
Failed to retrieve the value of MultisessionFuture (future_lapply-2) from cluster SOCKnode #2 (PID 12601 on localhost 'localhost'). The reason reported was 'error reading from connection'. Post-mortem diagnostic: A process with this PID exists, which suggests that the localhost worker is still alive.
--- failed re-building ‘data-table-syntax.Rmd’

--- re-building ‘glm.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.
prtconf: devinfo facility not available
prtconf: devinfo facility not available
--- finished re-building ‘glm.Rmd’

--- re-building ‘group-by.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 ‘group-by.Rmd’

--- re-building ‘ingesting-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.
--- finished re-building ‘ingesting-data.Rmd’

--- re-building ‘intro-disk-frame.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 ‘intro-disk-frame.Rmd’

SUMMARY: processing the following file failed:
  ‘data-table-syntax.Rmd’

Error: Vignette re-building failed.
Execution halted