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

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

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

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

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

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

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

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

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

SUMMARY: processing the following files failed:
  'intro-to-hypothesis-testing.Rmd' 'one-sample-sign-tests.Rmd'
  'one-sample-t-confidence-interval.Rmd' 'one-sample-t-test.Rmd'
  'one-sample-z-confidence-interval.Rmd'
  'one-sample-z-test-for-proportion.Rmd' 'one-sample-z-test.Rmd'
  'paired-tests.Rmd' 'two-sample-z-test.Rmd'

Error: Vignette re-building failed.
Execution halted