Error(s) in re-building vignettes:
  ...
--- re-building ‘howto_relational_db.rmd’ using rmarkdown

Quitting from howto_relational_db.rmd:62-64 [unnamed-chunk-4]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlib_error_package_not_found>
Error in `check_dbplyr()`:
! The package "dbplyr" is required to communicate with database
  backends.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'howto_relational_db.rmd' failed with diagnostics:
The package "dbplyr" is required to communicate with database backends.
--- failed re-building ‘howto_relational_db.rmd’

--- re-building ‘howto_relational_db_dm.rmd’ using rmarkdown

Quitting from howto_relational_db_dm.rmd:46-48 [unnamed-chunk-3]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlib_error_package_not_found>
Error:
! The package "dbplyr" is required to use `dm_from_con()`.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'howto_relational_db_dm.rmd' failed with diagnostics:
The package "dbplyr" is required to use `dm_from_con()`.
--- failed re-building ‘howto_relational_db_dm.rmd’

--- re-building ‘howto_row_level_access.rmd’ using rmarkdown

Quitting from howto_row_level_access.rmd:26-51 [unnamed-chunk-1]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlib_error_package_not_found>
Error in `check_dbplyr()`:
! The package "dbplyr" is required to communicate with database
  backends.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'howto_row_level_access.rmd' failed with diagnostics:
The package "dbplyr" is required to communicate with database backends.
--- failed re-building ‘howto_row_level_access.rmd’

--- re-building ‘howto_switch_from_DT.rmd’ using rmarkdown
Warning: Shiny application in a static R Markdown document
Warning: Shiny application in a static R Markdown document
--- finished re-building ‘howto_switch_from_DT.rmd’

SUMMARY: processing the following files failed:
  ‘howto_relational_db.rmd’ ‘howto_relational_db_dm.rmd’
  ‘howto_row_level_access.rmd’

Error: Vignette re-building failed.
Execution halted