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

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

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

Quitting from lines 260-262 [unnamed-chunk-13] (basics.Rmd)
Error: processing vignette 'basics.Rmd' failed with diagnostics:
The 'ggplot' engine requires the 'ggplot2' package be installed.
--- failed re-building ‘basics.Rmd’

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

Quitting from lines 113-114 [unnamed-chunk-8] (comparisons.Rmd)
Error: processing vignette 'comparisons.Rmd' failed with diagnostics:
The 'ggplot' engine requires the 'ggplot2' package be installed.
--- failed re-building ‘comparisons.Rmd’

--- re-building ‘confidence-intervals.Rmd’ using rmarkdown
--- finished re-building ‘confidence-intervals.Rmd’

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

Quitting from lines 76-77 [unnamed-chunk-4] (interactions.Rmd)
Error: processing vignette 'interactions.Rmd' failed with diagnostics:
The 'ggplot' engine requires the 'ggplot2' package be installed.
--- failed re-building ‘interactions.Rmd’

--- re-building ‘messy-data.Rmd’ using rmarkdown

Quitting from lines 56-58 [unnamed-chunk-2] (messy-data.Rmd)
Error: processing vignette 'messy-data.Rmd' failed with diagnostics:
there is no package called 'car'
--- failed re-building ‘messy-data.Rmd’

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

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

Quitting from lines 82-87 [unnamed-chunk-3] (predictions.Rmd)
Error: processing vignette 'predictions.Rmd' failed with diagnostics:
could not find function "lmer"
--- failed re-building ‘predictions.Rmd’

--- re-building ‘re-engineering-clds.rmd’ using rmarkdown
--- finished re-building ‘re-engineering-clds.rmd’

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

Quitting from lines 51-54 [unnamed-chunk-2] (sophisticated.Rmd)
Error: processing vignette 'sophisticated.Rmd' failed with diagnostics:
there is no package called 'lme4'
--- failed re-building ‘sophisticated.Rmd’

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

Quitting from lines 197-198 [unnamed-chunk-12] (transformations.Rmd)
Error: processing vignette 'transformations.Rmd' failed with diagnostics:
The 'ggplot' engine requires the 'ggplot2' package be installed.
--- failed re-building ‘transformations.Rmd’

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

--- re-building ‘vignette-topics.Rmd’ using rmarkdown
[WARNING] Div at vignette-topics.knit.md line 10 column 1 unclosed at vignette-topics.knit.md line 793 column 1, closing implicitly.
--- finished re-building ‘vignette-topics.Rmd’

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

Quitting from lines 200-205 [unnamed-chunk-2] (xplanations.Rmd)
Error: processing vignette 'xplanations.Rmd' failed with diagnostics:
The 'ggplot' engine requires the 'ggplot2' package be installed.
--- failed re-building ‘xplanations.Rmd’

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

SUMMARY: processing the following files failed:
  ‘basics.Rmd’ ‘comparisons.Rmd’ ‘interactions.Rmd’ ‘messy-data.Rmd’
  ‘predictions.Rmd’ ‘sophisticated.Rmd’ ‘transformations.Rmd’
  ‘xplanations.Rmd’

Error: Vignette re-building failed.
Execution halted