Package suggested but not available for checking: ‘semPlot’
Error(s) in re-building vignettes:
--- re-building ‘short_intro.Rmd’ using knitr

Quitting from lines 45-46 [unnamed-chunk-3] (short_intro.Rmd)
Error: processing vignette 'short_intro.Rmd' failed with diagnostics:
there is no package called 'semPlot'
--- failed re-building ‘short_intro.Rmd’

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

Error: Vignette re-building failed.
Execution halted