Error(s) in re-building vignettes:
  ...
--- re-building ‘back-testing-and-hyperparameter-tuning.Rmd’ using rmarkdown
--- finished re-building ‘back-testing-and-hyperparameter-tuning.Rmd’

--- re-building ‘best-model-selection.Rmd’ using rmarkdown
--- finished re-building ‘best-model-selection.Rmd’

--- re-building ‘external-regressors.Rmd’ using rmarkdown
--- finished re-building ‘external-regressors.Rmd’

--- re-building ‘feature-engineering.Rmd’ using rmarkdown

Quitting from feature-engineering.Rmd:76-109 [unnamed-chunk-3]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `file()`:
! cannot open the connection
---
Backtrace:
     ▆
  1. └─finnts::set_run_info(experiment_name = "finnts_fcst", run_name = "R1_run")
  2.   └─finnts:::write_data(...)
  3.     └─finnts:::write_data_folder(...)
  4.       └─finnts:::write_data_type(x, final_path, type)
  5.         ├─utils::write.csv(x, path, row.names = FALSE)
  6.         │ └─base::eval.parent(Call)
  7.         │   └─base::eval(expr, p)
  8.         │     └─base::eval(expr, p)
  9.         └─utils::write.table(...)
 10.           └─base::file(file, ifelse(append, "a", "w"))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'feature-engineering.Rmd' failed with diagnostics:
cannot open the connection
--- failed re-building ‘feature-engineering.Rmd’

--- re-building ‘feature-selection.Rmd’ using rmarkdown
--- finished re-building ‘feature-selection.Rmd’

--- re-building ‘finnts.Rmd’ using rmarkdown
--- finished re-building ‘finnts.Rmd’

--- re-building ‘forecast-components.Rmd’ using rmarkdown
--- finished re-building ‘forecast-components.Rmd’

--- re-building ‘hierarchical-forecasting.Rmd’ using rmarkdown
--- finished re-building ‘hierarchical-forecasting.Rmd’

--- re-building ‘models-used-in-finnts.Rmd’ using rmarkdown
--- finished re-building ‘models-used-in-finnts.Rmd’

--- re-building ‘parallel-processing.Rmd’ using rmarkdown
--- finished re-building ‘parallel-processing.Rmd’

--- re-building ‘tips-for-production.Rmd’ using rmarkdown
--- finished re-building ‘tips-for-production.Rmd’

SUMMARY: processing the following file failed:
  ‘feature-engineering.Rmd’

Error: Vignette re-building failed.
Execution halted