Error(s) in re-building vignettes:
--- re-building 'introduction.Rmd.rsp' using rsp
Warning in parseRepos(sets = repos, where = where, fallback = fallback,  :
  Had to fall back to a set of predefined repositories (please make sure to set your package repositories properly, cf. ?setRepositories): CRAN: '@CRAN@' -> 'https://cran.r-project.org'


processing file: d:/RCompile/CRANpkg/local/4.0/rbi.Rcheck/vign_test/rbi/vignettes/introduction.Rmd
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output file: introduction.md

Error: processing vignette 'introduction.Rmd.rsp' failed with diagnostics:
there is no package called 'markdown'
--- failed re-building 'introduction.Rmd.rsp'

SUMMARY: processing the following file failed:
  'introduction.Rmd.rsp'

Error: Vignette re-building failed.
Execution halted