Error(s) in re-building vignettes:
--- re-building ‘classes.Rmd’ using rmarkdown
OMP: Warning #96: Cannot form a team with 7 threads, using 2 instead.
OMP: Hint Consider unsetting KMP_DEVICE_THREAD_LIMIT (KMP_ALL_THREADS), KMP_TEAMS_THREAD_LIMIT, and OMP_THREAD_LIMIT (if any are set).
--- finished re-building ‘classes.Rmd’

--- re-building ‘engine.Rmd’ using rmarkdown
OMP: Warning #96: Cannot form a team with 3 threads, using 2 instead.
OMP: Hint Consider unsetting KMP_DEVICE_THREAD_LIMIT (KMP_ALL_THREADS), KMP_TEAMS_THREAD_LIMIT, and OMP_THREAD_LIMIT (if any are set).
--- finished re-building ‘engine.Rmd’

--- re-building ‘kable.Rmd’ using rmarkdown
OMP: Warning #96: Cannot form a team with 23 threads, using 2 instead.
OMP: Hint Consider unsetting KMP_DEVICE_THREAD_LIMIT (KMP_ALL_THREADS), KMP_TEAMS_THREAD_LIMIT, and OMP_THREAD_LIMIT (if any are set).
--- finished re-building ‘kable.Rmd’

--- re-building ‘rmarkdown.Rmd’ using rmarkdown
OMP: Warning #96: Cannot form a team with 5 threads, using 2 instead.
OMP: Hint Consider unsetting KMP_DEVICE_THREAD_LIMIT (KMP_ALL_THREADS), KMP_TEAMS_THREAD_LIMIT, and OMP_THREAD_LIMIT (if any are set).
--- finished re-building ‘rmarkdown.Rmd’

--- re-building ‘slickr.Rmd’ using rmarkdown
Quitting from lines 23-25 (slickr.Rmd) 
Error: processing vignette 'slickr.Rmd' failed with diagnostics:
there is no package called 'slickR'
--- failed re-building ‘slickr.Rmd’

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

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

--- re-building ‘tikz.Rmd’ using rmarkdown
OMP: Warning #96: Cannot form a team with 5 threads, using 2 instead.
OMP: Hint Consider unsetting KMP_DEVICE_THREAD_LIMIT (KMP_ALL_THREADS), KMP_TEAMS_THREAD_LIMIT, and OMP_THREAD_LIMIT (if any are set).
--- finished re-building ‘tikz.Rmd’

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

Error: Vignette re-building failed.
Execution halted