Error(s) in re-building vignettes:
--- re-building 'box-elements.Rmd' using rmarkdown
Could not fetch https://dgranjon.shinyapps.io/shinydashboardPlus-descriptionBlock/
HttpExceptionRequest Request {
  host                 = "dgranjon.shinyapps.io"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/shinydashboardPlus-descriptionBlock/"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 (ConnectionFailure user error (Network.Socket.gai_strerror not supported: 11001))
Error: processing vignette 'box-elements.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'box-elements.Rmd'

--- re-building 'controlbar.Rmd' using rmarkdown
--- finished re-building 'controlbar.Rmd'

--- re-building 'css-preloader.Rmd' using rmarkdown
--- finished re-building 'css-preloader.Rmd'

--- re-building 'enhanced-header.Rmd' using rmarkdown
Could not fetch https://dgranjon.shinyapps.io/shinydashboardPlus-dashboardUser/
HttpExceptionRequest Request {
  host                 = "dgranjon.shinyapps.io"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/shinydashboardPlus-dashboardUser/"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 ConnectionTimeout
Error: processing vignette 'enhanced-header.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'enhanced-header.Rmd'

--- re-building 'extra-elements.Rmd' using rmarkdown
--- finished re-building 'extra-elements.Rmd'

--- re-building 'improved-boxes.Rmd' using rmarkdown
--- finished re-building 'improved-boxes.Rmd'

--- re-building 'more-skins.Rmd' using rmarkdown
--- finished re-building 'more-skins.Rmd'

--- re-building 'shinydashboardPlus.Rmd' using rmarkdown
--- finished re-building 'shinydashboardPlus.Rmd'

SUMMARY: processing the following files failed:
  'box-elements.Rmd' 'enhanced-header.Rmd'

Error: Vignette re-building failed.
Execution halted