Error(s) in re-building vignettes:
--- re-building ‘Discriminant_analysis_examples.Rmd’ using rmarkdown

Quitting from Discriminant_analysis_examples.Rmd:387-399 [unnamed-chunk-35]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `load()`:
! cannot open the connection to 'https://wis.kuleuven.be/statdatascience/robust/data/mnist-rdata'
---
Backtrace:
    ▆
 1. └─base::load(mnist_url)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'Discriminant_analysis_examples.Rmd' failed with diagnostics:
cannot open the connection to 'https://wis.kuleuven.be/statdatascience/robust/data/mnist-rdata'
--- failed re-building ‘Discriminant_analysis_examples.Rmd’

--- re-building ‘K_nearest_neighbors_examples.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘K_nearest_neighbors_examples.Rmd’

--- re-building ‘Neural_net_examples.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘Neural_net_examples.Rmd’

--- re-building ‘Random_forest_examples.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘Random_forest_examples.Rmd’

--- re-building ‘Rpart_examples.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘Rpart_examples.Rmd’

--- re-building ‘Support_vector_machine_examples.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘Support_vector_machine_examples.Rmd’

--- re-building ‘predsplot_examples.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘predsplot_examples.Rmd’

SUMMARY: processing the following file failed:
  ‘Discriminant_analysis_examples.Rmd’

Error: Vignette re-building failed.
Execution halted