Error(s) in re-building vignettes:
--- re-building 'dictionary_combine.Rmd' using rmarkdown
--- finished re-building 'dictionary_combine.Rmd'

--- re-building 'dictionary_depth_charts.Rmd' using rmarkdown
--- finished re-building 'dictionary_depth_charts.Rmd'

--- re-building 'dictionary_draft_picks.Rmd' using rmarkdown
--- finished re-building 'dictionary_draft_picks.Rmd'

--- re-building 'dictionary_espn_qbr.Rmd' using rmarkdown
--- finished re-building 'dictionary_espn_qbr.Rmd'

--- re-building 'dictionary_ff_opportunity.Rmd' using rmarkdown
--- finished re-building 'dictionary_ff_opportunity.Rmd'

--- re-building 'dictionary_ff_playerids.Rmd' using rmarkdown
--- finished re-building 'dictionary_ff_playerids.Rmd'

--- re-building 'dictionary_ff_rankings.Rmd' using rmarkdown
--- finished re-building 'dictionary_ff_rankings.Rmd'

--- re-building 'dictionary_injuries.Rmd' using rmarkdown
--- finished re-building 'dictionary_injuries.Rmd'

--- re-building 'dictionary_nextgen_stats.Rmd' using rmarkdown
--- finished re-building 'dictionary_nextgen_stats.Rmd'

--- re-building 'dictionary_pbp.Rmd' using rmarkdown
--- finished re-building 'dictionary_pbp.Rmd'

--- re-building 'dictionary_pfr_passing.Rmd' using rmarkdown
--- finished re-building 'dictionary_pfr_passing.Rmd'

--- re-building 'dictionary_player_stats.Rmd' using rmarkdown
--- finished re-building 'dictionary_player_stats.Rmd'

--- re-building 'dictionary_rosters.Rmd' using rmarkdown
--- finished re-building 'dictionary_rosters.Rmd'

--- re-building 'dictionary_schedules.Rmd' using rmarkdown
--- finished re-building 'dictionary_schedules.Rmd'

--- re-building 'dictionary_snap_counts.Rmd' using rmarkdown
--- finished re-building 'dictionary_snap_counts.Rmd'

--- re-building 'dictionary_trades.Rmd' using rmarkdown
--- finished re-building 'dictionary_trades.Rmd'

--- re-building 'exporting_nflreadr.Rmd' using rmarkdown
--- finished re-building 'exporting_nflreadr.Rmd'

+-+exporting_nflreadr.html
SUMMARY: processing the following file failed:
  'exporting_nflreadr.Rmd'

Error: Vignette re-building failed.
Execution halted