Error(s) in re-building vignettes:
--- re-building 'all_plots_examples.Rmd' using rmarkdown
--- finished re-building 'all_plots_examples.Rmd'

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

--- re-building 'bootstrap.Rmd' using rmarkdown
Could not fetch https://www.datasurg.net/wp-content/uploads/2018/07/table1_boot-1024x225.png
HttpExceptionRequest Request {
  host                 = "www.datasurg.net"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/wp-content/uploads/2018/07/table1_boot-1024x225.png"
  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 'bootstrap.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'bootstrap.Rmd'

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

--- re-building 'export.Rmd' using rmarkdown
Could not fetch https://www.datasurg.net/wp-content/uploads/2018/05/example_or_plot.png
HttpExceptionRequest Request {
  host                 = "www.datasurg.net"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/wp-content/uploads/2018/05/example_or_plot.png"
  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 'export.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'export.Rmd'

--- re-building 'finalfit.Rmd' using rmarkdown
Could not fetch https://www.datasurg.net/wp-content/uploads/2018/05/table1.jpg
HttpExceptionRequest Request {
  host                 = "www.datasurg.net"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/wp-content/uploads/2018/05/table1.jpg"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 (ConnectionFailure user error (Network.Socket.gai_strerror not supported: 11002))
Error: processing vignette 'finalfit.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'finalfit.Rmd'

--- re-building 'missing.Rmd' using rmarkdown
Could not fetch https://www.datasurg.net/wp-content/uploads/2018/07/missing_values-1024x312.png
HttpExceptionRequest Request {
  host                 = "www.datasurg.net"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/wp-content/uploads/2018/07/missing_values-1024x312.png"
  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 'missing.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'missing.Rmd'

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

SUMMARY: processing the following files failed:
  'bootstrap.Rmd' 'export.Rmd' 'finalfit.Rmd' 'missing.Rmd'

Error: Vignette re-building failed.
Execution halted