Error(s) in re-building vignettes:
--- re-building ‘Fetching-historical-future-rates.Rmd’ using rmarkdown

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: 'bizdays'

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

    offset


Attaching package: 'fixedincome'

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

    first, last

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Quitting from lines 55-78 (Fetching-historical-future-rates.Rmd) 
Error: processing vignette 'Fetching-historical-future-rates.Rmd' failed with diagnostics:
Problem while computing `adjusted_tax = rates("discrete",
business_days/252, 1e+05/price)`.
Caused by error in `rates()`:
! could not find function "rates"
--- failed re-building ‘Fetching-historical-future-rates.Rmd’

--- re-building ‘Fetching-historical-yield-curve.Rmd’ using rmarkdown
--- finished re-building ‘Fetching-historical-yield-curve.Rmd’

SUMMARY: processing the following file failed:
  ‘Fetching-historical-future-rates.Rmd’

Error: Vignette re-building failed.
Execution halted