Error(s) in re-building vignettes:
  ...
--- re-building ‘blackwhitefigures.Rmd’ using rmarkdown
--- finished re-building ‘blackwhitefigures.Rmd’

--- re-building ‘custplot.Rmd’ using rmarkdown
Quitting from lines 128-130 (custplot.Rmd) 
Error: processing vignette ‘custplot.Rmd’ failed with diagnostics:
DLL requires the use of native symbols
--- failed re-building ‘custplot.Rmd’

--- re-building ‘plot_interactions.Rmd’ using rmarkdown
--- finished re-building ‘plot_interactions.Rmd’

--- re-building ‘plot_likert_scales.Rmd’ using rmarkdown
--- finished re-building ‘plot_likert_scales.Rmd’

--- re-building ‘plot_marginal_effects.Rmd’ using rmarkdown
--- finished re-building ‘plot_marginal_effects.Rmd’

--- re-building ‘plot_model_estimates.Rmd’ using rmarkdown
--- finished re-building ‘plot_model_estimates.Rmd’

--- re-building ‘sjtitemanalysis.Rmd’ using rmarkdown
--- finished re-building ‘sjtitemanalysis.Rmd’

--- re-building ‘tab_bayes.Rmd’ using rmarkdown
Quitting from lines 70-71 (tab_bayes.Rmd) 
Error: processing vignette ‘tab_bayes.Rmd’ failed with diagnostics:
DLL requires the use of native symbols
--- failed re-building ‘tab_bayes.Rmd’

--- re-building ‘tab_mixed.Rmd’ using rmarkdown
Quitting from lines 49-53 (tab_mixed.Rmd) 
Error: processing vignette ‘tab_mixed.Rmd’ failed with diagnostics:
DLL requires the use of native symbols
--- failed re-building ‘tab_mixed.Rmd’

--- re-building ‘tab_model_estimates.Rmd’ using rmarkdown
Quitting from lines 105-106 (tab_model_estimates.Rmd) 
Error: processing vignette ‘tab_model_estimates.Rmd’ failed with diagnostics:
DLL requires the use of native symbols
--- failed re-building ‘tab_model_estimates.Rmd’

--- re-building ‘tab_model_robust.Rmd’ using rmarkdown
--- finished re-building ‘tab_model_robust.Rmd’

--- re-building ‘table_css.Rmd’ using rmarkdown
--- finished re-building ‘table_css.Rmd’

SUMMARY: processing the following files failed:
  ‘custplot.Rmd’ ‘tab_bayes.Rmd’ ‘tab_mixed.Rmd’
  ‘tab_model_estimates.Rmd’

Error: Vignette re-building failed.
Execution halted