Error(s) in re-building vignettes:
  ...
--- re-building 'text2sdg.Rmd' using rmarkdown
Quitting from lines 42-45 (text2sdg.Rmd) 
Error: processing vignette 'text2sdg.Rmd' failed with diagnostics:
invalid UTF-8 byte sequence detected; try calling stri_enc_toutf8()
--- failed re-building 'text2sdg.Rmd'

SUMMARY: processing the following file failed:
  'text2sdg.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'text2sdg.Rmd' using rmarkdown