Error(s) in re-building vignettes:
--- re-building ‘classes.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Quitting from lines 32-39 (classes.Rmd) 
Error: processing vignette 'classes.Rmd' failed with diagnostics:
<text>:4:11: unexpected '>'
3: 
4: iris_rev |>
             ^
--- failed re-building ‘classes.Rmd’

--- re-building ‘engine.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 21.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 24.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 27.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 47.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 21.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 24.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 27.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 47.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 21.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 24.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 27.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 47.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 17.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 20.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 34.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 21.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 24.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 27.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 47.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 21.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 24.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 27.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 47.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 21.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 24.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 27.
Warning: LaTeX Warning: Font shape declaration has incorrect series value `mc'.
Warning:                It should not contain an `m'! Please correct it.
Warning:                Found on input line 47.
--- finished re-building ‘engine.Rmd’

--- re-building ‘kable.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Quitting from lines 44-48 (kable.Rmd) 
Error: processing vignette 'kable.Rmd' failed with diagnostics:
<text>:2:18: unexpected '>'
1: 
2: kbl <- tex_file |>
                    ^
--- failed re-building ‘kable.Rmd’

--- re-building ‘rmarkdown.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Quitting from lines 34-38 (rmarkdown.Rmd) 
Error: processing vignette 'rmarkdown.Rmd' failed with diagnostics:
<text>:2:46: unexpected '>'
1: 
2: knitr::kable(head(iris,5),format = 'latex') |>
                                                ^
--- failed re-building ‘rmarkdown.Rmd’

--- re-building ‘tests_and_coverage.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘tests_and_coverage.Rmd’

--- re-building ‘tex_packages.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘tex_packages.Rmd’

--- re-building ‘tikz.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘tikz.Rmd’

SUMMARY: processing the following files failed:
  ‘classes.Rmd’ ‘kable.Rmd’ ‘rmarkdown.Rmd’

Error: Vignette re-building failed.
Execution halted