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

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

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

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

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

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

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

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

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

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

--- re-building 'getting_started.Rmd' using rmarkdown
pandoc.exe: Could not fetch https://images.manning.com/720/960/resize/book/a/4e5e97f-4e8d-4d97-a715-f6c2b0eb95f5/Allaire-DLwithR-HI.png
HttpExceptionRequest Request {
  host                 = "images.manning.com"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/720/960/resize/book/a/4e5e97f-4e8d-4d97-a715-f6c2b0eb95f5/Allaire-DLwithR-HI.png"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 (InternalException (HandshakeFailed (Error_Packet_unexpected "Alert [(AlertLevel_Fatal,BadRecordMac)]" " expected: change cipher")))
Error: processing vignette 'getting_started.Rmd' failed with diagnostics:
pandoc document conversion failed with error 67
--- failed re-building 'getting_started.Rmd'

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

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

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

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

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

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

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

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

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

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

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

Error: Vignette re-building failed.
Execution halted