Error(s) in re-building vignettes:
--- re-building 'udpipe-annotation.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Downloading udpipe model from https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/dutch-alpino-ud-2.3-181115.udpipe to d:/RCompile/CRANpkg/local/3.6/udpipe.Rcheck/vign_test/udpipe/vignettes/dutch-alpino-ud-2.3-181115.udpipe
trying URL 'https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/dutch-alpino-ud-2.3-181115.udpipe'
Content type 'application/octet-stream' length 16922217 bytes (16.1 MB)
==================================================
downloaded 16.1 MB

Downloading udpipe model from https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.0/master/inst/udpipe-ud-2.0-170801/sanskrit-ud-2.0-170801.udpipe to d:/RCompile/CRANpkg/local/3.6/udpipe.Rcheck/vign_test/udpipe/vignettes/sanskrit-ud-2.0-170801.udpipe
trying URL 'https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.0/master/inst/udpipe-ud-2.0-170801/sanskrit-ud-2.0-170801.udpipe'
Content type 'application/octet-stream' length 2107925 bytes (2.0 MB)
==================================================
downloaded 2.0 MB

--- finished re-building 'udpipe-annotation.Rmd'

--- re-building 'udpipe-train.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
--- finished re-building 'udpipe-train.Rmd'

--- re-building 'udpipe-tryitout.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Warning in get_engine(options$engine) :
  Unknown language engine 'eval' (must be registered via knit_engines$set()).
Downloading udpipe model from https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/dutch-alpino-ud-2.3-181115.udpipe to d:/RCompile/CRANpkg/local/3.6/udpipe.Rcheck/vign_test/udpipe/vignettes/dutch-alpino-ud-2.3-181115.udpipe
trying URL 'https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/dutch-alpino-ud-2.3-181115.udpipe'
Content type 'application/octet-stream' length 16922217 bytes (16.1 MB)
==================================================
downloaded 16.1 MB

--- finished re-building 'udpipe-tryitout.Rmd'

--- re-building 'udpipe-usecase-postagging-lemmatisation.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Downloading udpipe model from https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/spanish-gsd-ud-2.3-181115.udpipe to d:/RCompile/CRANpkg/local/3.6/udpipe.Rcheck/vign_test/udpipe/vignettes/spanish-gsd-ud-2.3-181115.udpipe
trying URL 'https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/spanish-gsd-ud-2.3-181115.udpipe'
Warning in utils::download.file(url = url, destfile = to, mode = "wb") :
  InternetOpenUrl failed: 'Das Zeitlimit für den Vorgang wurde erreicht.'
Quitting from lines 53-61 (udpipe-usecase-postagging-lemmatisation.Rmd) 
Error: processing vignette 'udpipe-usecase-postagging-lemmatisation.Rmd' failed with diagnostics:
cannot open URL 'https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/spanish-gsd-ud-2.3-181115.udpipe'
--- failed re-building 'udpipe-usecase-postagging-lemmatisation.Rmd'

--- re-building 'udpipe-usecase-topicmodelling.Rmd' using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Downloading udpipe model from https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/french-gsd-ud-2.3-181115.udpipe to d:/RCompile/CRANpkg/local/3.6/udpipe.Rcheck/vign_test/udpipe/vignettes/french-gsd-ud-2.3-181115.udpipe
trying URL 'https://raw.githubusercontent.com/jwijffels/udpipe.models.ud.2.3/master/inst/udpipe-ud-2.3-181115/french-gsd-ud-2.3-181115.udpipe'
Content type 'application/octet-stream' length 21885625 bytes (20.9 MB)
==================================================
downloaded 20.9 MB

--- finished re-building 'udpipe-usecase-topicmodelling.Rmd'

SUMMARY: processing the following file failed:
  'udpipe-usecase-postagging-lemmatisation.Rmd'

Error: Vignette re-building failed.
Execution halted