Error(s) in re-building vignettes:
--- re-building 'forplo_vignette.Rmd' using rmarkdown
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  font family not found in Windows font database
Error: processing vignette 'forplo_vignette.Rmd' failed with diagnostics:
object 'preview_math' not found
--- failed re-building 'forplo_vignette.Rmd'

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

Error: Vignette re-building failed.
Execution halted