Error(s) in re-building vignettes:
--- re-building ‘classification.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘classification.Rmd’

--- re-building ‘clustering.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
── Attaching packages ─────────────────────────────────────── tidyverse 1.3.1 ──
✔ ggplot2 3.3.5     ✔ purrr   0.3.4
✔ tibble  3.1.3     ✔ dplyr   1.0.7
✔ tidyr   1.1.3     ✔ stringr 1.4.0
✔ readr   2.0.1     ✔ forcats 0.5.1
── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
Loading required package: lattice

Attaching package: 'caret'

The following object is masked from 'package:purrr':

    lift

── Attaching packages ────────────────────────────────────── tidymodels 0.1.3 ──
✔ broom        0.7.9      ✔ rsample      0.1.0 
✔ dials        0.0.9      ✔ tune         0.1.6 
✔ infer        1.0.0      ✔ workflows    0.2.3 
✔ modeldata    0.1.1      ✔ workflowsets 0.1.0 
✔ parsnip      0.1.7      ✔ yardstick    0.0.8 
✔ recipes      0.1.16     
── Conflicts ───────────────────────────────────────── tidymodels_conflicts() ──
✖ scales::discard()        masks purrr::discard()
✖ dplyr::filter()          masks stats::filter()
✖ recipes::fixed()         masks stringr::fixed()
✖ dplyr::lag()             masks stats::lag()
✖ caret::lift()            masks purrr::lift()
✖ yardstick::precision()   masks caret::precision()
✖ yardstick::recall()      masks caret::recall()
✖ yardstick::sensitivity() masks caret::sensitivity()
✖ yardstick::spec()        masks readr::spec()
✖ yardstick::specificity() masks caret::specificity()
✖ recipes::step()          masks stats::step()
• Use tidymodels_prefer() to resolve common conflicts.
Welcome! Want to learn more? See two factoextra-related books at https://goo.gl/ve3WBa
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Quitting from lines 70-73 (clustering.Rmd) 
Error: processing vignette 'clustering.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘clustering.Rmd’

--- re-building ‘fit.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘fit.Rmd’

--- re-building ‘introduction.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘introduction.Rmd’

--- re-building ‘models.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘models.Rmd’

--- re-building ‘regression.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
── Attaching packages ────────────────────────────────────── tidymodels 0.1.3 ──
✔ broom        0.7.9      ✔ recipes      0.1.16
✔ dials        0.0.9      ✔ rsample      0.1.0 
✔ dplyr        1.0.7      ✔ tibble       3.1.3 
✔ ggplot2      3.3.5      ✔ tidyr        1.1.3 
✔ infer        1.0.0      ✔ tune         0.1.6 
✔ modeldata    0.1.1      ✔ workflows    0.2.3 
✔ parsnip      0.1.7      ✔ workflowsets 0.1.0 
✔ purrr        0.3.4      ✔ yardstick    0.0.8 
── Conflicts ───────────────────────────────────────── tidymodels_conflicts() ──
✖ purrr::discard() masks scales::discard()
✖ dplyr::filter()  masks stats::filter()
✖ dplyr::lag()     masks stats::lag()
✖ recipes::step()  masks stats::step()
• Use tidymodels_prefer() to resolve common conflicts.
--- finished re-building ‘regression.Rmd’

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

Error: Vignette re-building failed.
Execution halted