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

--- re-building ‘custplot.Rmd’ using rmarkdown
--- finished 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
--- finished re-building ‘tab_bayes.Rmd’

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

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

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

Quitting from lines 125-145 [unnamed-chunk-7] (tab_model_robust.Rmd)
Error: processing vignette ‘tab_model_robust.Rmd’ failed with diagnostics:
ℹ In index: 1.
ℹ With name: model.
Caused by error:
! Unable to extract a variance-covariance matrix for model object of class
  `lmerMod`. Different values of the `vcov` argument trigger calls to the
  `sandwich` or `clubSandwich` packages in order to extract the matrix
  (see `?insight::get_varcov`). Your model or the requested estimation
  type may not be supported by one or both of those packages, or you were
  missing one or more required arguments in `vcov_args` (like `cluster`).
--- failed re-building ‘tab_model_robust.Rmd’

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

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

Error: Vignette re-building failed.
Execution halted