Error(s) in re-building vignettes:
--- re-building 'Coxnet.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available because the rmarkdown package is not available. Did you forget to add it to Suggests in DESCRIPTION? Please see https://github.com/yihui/knitr/issues/1864 for more information.
--- finished re-building 'Coxnet.Rmd'

--- re-building 'glmnet.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available because the rmarkdown package is not available. Did you forget to add it to Suggests in DESCRIPTION? Please see https://github.com/yihui/knitr/issues/1864 for more information.
Quitting from lines 347-353 (glmnet.Rmd) 
Warning in dev.off(dv) : processing of the plot ran out of memory
Error: processing vignette 'glmnet.Rmd' failed with diagnostics:
unable to allocate memory (in GEregister)
--- failed re-building 'glmnet.Rmd'

Warning in .Internal(quit(save, status, runLast)) :
  processing of the plot ran out of memory
--- re-building 'glmnetFamily.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available because the rmarkdown package is not available. Did you forget to add it to Suggests in DESCRIPTION? Please see https://github.com/yihui/knitr/issues/1864 for more information.
Loading required package: Matrix
Loaded glmnet 4.0-2
--- finished re-building 'glmnetFamily.Rmd'

--- re-building 'relax.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available because the rmarkdown package is not available. Did you forget to add it to Suggests in DESCRIPTION? Please see https://github.com/yihui/knitr/issues/1864 for more information.
--- finished re-building 'relax.Rmd'

SUMMARY: processing the following file failed:
  'glmnet.Rmd'

Error: Vignette re-building failed.
Execution halted