Error(s) in re-building vignettes:
--- re-building 'Introduction.Rmd' using rmarkdown
Error: processing vignette 'Introduction.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'Introduction.Rmd'

--- re-building 'confidence_intervals.Rmd' using rmarkdown
Error: processing vignette 'confidence_intervals.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'confidence_intervals.Rmd'

--- re-building 'data_format.Rmd' using rmarkdown
Error: processing vignette 'data_format.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'data_format.Rmd'

--- re-building 'nll_functions.Rmd' using rmarkdown
Error: processing vignette 'nll_functions.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'nll_functions.Rmd'

--- re-building 'nll_functions_modifying.Rmd' using rmarkdown
Error: processing vignette 'nll_functions_modifying.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'nll_functions_modifying.Rmd'

--- re-building 'nll_functions_using.Rmd' using rmarkdown
Error: processing vignette 'nll_functions_using.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'nll_functions_using.Rmd'

--- re-building 'probability_distributions.Rmd' using rmarkdown
Error: processing vignette 'probability_distributions.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'probability_distributions.Rmd'

--- re-building 'starting_values.Rmd' using rmarkdown
Error: processing vignette 'starting_values.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'starting_values.Rmd'

--- re-building 'the_exponential_distribution.Rmd' using rmarkdown
Error: processing vignette 'the_exponential_distribution.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'the_exponential_distribution.Rmd'

--- re-building 'worked_examples_I.Rmd' using rmarkdown
Error: processing vignette 'worked_examples_I.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'worked_examples_I.Rmd'

--- re-building 'worked_examples_II.Rmd' using rmarkdown
Error: processing vignette 'worked_examples_II.Rmd' failed with diagnostics:
DLL 'rlang' not found: maybe not installed for this architecture?
--- failed re-building 'worked_examples_II.Rmd'

SUMMARY: processing the following files failed:
  'Introduction.Rmd' 'confidence_intervals.Rmd' 'data_format.Rmd'
  'nll_functions.Rmd' 'nll_functions_modifying.Rmd'
  'nll_functions_using.Rmd' 'probability_distributions.Rmd'
  'starting_values.Rmd' 'the_exponential_distribution.Rmd'
  'worked_examples_I.Rmd' 'worked_examples_II.Rmd'

Error: Vignette re-building failed.
Execution halted