Error(s) in re-building vignettes:
  ...
--- re-building ‘TT-01-time-based-filtering.Rmd’ using rmarkdown

Attaching package: 'tibbletime'

The following object is masked from 'package:stats':

    filter


Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

--- finished re-building ‘TT-01-time-based-filtering.Rmd’

--- re-building ‘TT-02-changing-time-periods.Rmd’ using rmarkdown

Attaching package: 'tibbletime'

The following object is masked from 'package:stats':

    filter


Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

--- finished re-building ‘TT-02-changing-time-periods.Rmd’

--- re-building ‘TT-03-rollify-for-rolling-analysis.Rmd’ using rmarkdown

Attaching package: 'tibbletime'

The following object is masked from 'package:stats':

    filter


Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Quitting from lines 30-40 (TT-03-rollify-for-rolling-analysis.Rmd) 
Error: processing vignette 'TT-03-rollify-for-rolling-analysis.Rmd' failed with diagnostics:
there is no package called 'tidyr'
--- failed re-building ‘TT-03-rollify-for-rolling-analysis.Rmd’

--- re-building ‘TT-04-use-with-dplyr.Rmd’ using rmarkdown

Attaching package: 'tibbletime'

The following object is masked from 'package:stats':

    filter


Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union


Attaching package: 'lubridate'

The following objects are masked from 'package:base':

    date, intersect, setdiff, union

`summarise()` regrouping output by 'year' (override with `.groups` argument)
--- finished re-building ‘TT-04-use-with-dplyr.Rmd’

SUMMARY: processing the following file failed:
  ‘TT-03-rollify-for-rolling-analysis.Rmd’

Error: Vignette re-building failed.
Execution halted