Error(s) in re-building vignettes:
--- re-building 'help.Rmd' using rmarkdown
trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/ps_1.3.4.zip'
Content type 'application/zip' length 701877 bytes (685 KB)
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downloaded 685 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/processx_3.4.4.zip'
Content type 'application/zip' length 1378807 bytes (1.3 MB)
==================================================
downloaded 1.3 MB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/callr_3.4.4.zip'
Content type 'application/zip' length 379517 bytes (370 KB)
==================================================
downloaded 370 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/prettyunits_1.1.1.zip'
Content type 'application/zip' length 37818 bytes (36 KB)
==================================================
downloaded 36 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/backports_1.1.9.zip'
Content type 'application/zip' length 87872 bytes (85 KB)
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downloaded 85 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/assertthat_0.2.1.zip'
Content type 'application/zip' length 54962 bytes (53 KB)
==================================================
downloaded 53 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/glue_1.4.2.zip'
Content type 'application/zip' length 154912 bytes (151 KB)
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downloaded 151 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/fansi_0.4.1.zip'
Content type 'application/zip' length 223086 bytes (217 KB)
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downloaded 217 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/desc_1.2.0.zip'
Content type 'application/zip' length 288844 bytes (282 KB)
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downloaded 282 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/pkgbuild_1.1.0.zip'
Content type 'application/zip' length 141401 bytes (138 KB)
==================================================
downloaded 138 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/rprojroot_1.3-2.zip'
Content type 'application/zip' length 84699 bytes (82 KB)
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downloaded 82 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/rstudioapi_0.11.zip'
Content type 'application/zip' length 280081 bytes (273 KB)
==================================================
downloaded 273 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/cli_2.0.2.zip'
Content type 'application/zip' length 399277 bytes (389 KB)
==================================================
downloaded 389 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/crayon_1.3.4.zip'
Content type 'application/zip' length 750064 bytes (732 KB)
==================================================
downloaded 732 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/digest_0.6.25.zip'
Content type 'application/zip' length 244848 bytes (239 KB)
==================================================
downloaded 239 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/ellipsis_0.3.1.zip'
Content type 'application/zip' length 46112 bytes (45 KB)
==================================================
downloaded 45 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/evaluate_0.14.zip'
Content type 'application/zip' length 76744 bytes (74 KB)
==================================================
downloaded 74 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/magrittr_1.5.zip'
Content type 'application/zip' length 157519 bytes (153 KB)
==================================================
downloaded 153 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/pkgload_1.1.0.zip'
Content type 'application/zip' length 162812 bytes (158 KB)
==================================================
downloaded 158 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/praise_1.0.0.zip'
Content type 'application/zip' length 19718 bytes (19 KB)
==================================================
downloaded 19 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/R6_2.4.1.zip'
Content type 'application/zip' length 59241 bytes (57 KB)
==================================================
downloaded 57 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/rlang_0.4.7.zip'
Content type 'application/zip' length 1134560 bytes (1.1 MB)
==================================================
downloaded 1.1 MB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/withr_2.2.0.zip'
Content type 'application/zip' length 207800 bytes (202 KB)
==================================================
downloaded 202 KB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/pls_2.7-3.zip'
Content type 'application/zip' length 1267398 bytes (1.2 MB)
==================================================
downloaded 1.2 MB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/testthat_2.3.2.zip'
Content type 'application/zip' length 1975378 bytes (1.9 MB)
==================================================
downloaded 1.9 MB

trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/apercu_0.2.4.zip'
Content type 'application/zip' length 28504 bytes (27 KB)
==================================================
downloaded 27 KB

* installing *source* package 'dummyPackage' ...
** using staged installation
** R
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
*** arch - i386
*** arch - x64
** testing if installed package can be loaded from final location
*** arch - i386
*** arch - x64
** testing if installed package keeps a record of temporary installation path
* DONE (dummyPackage)
Quitting from lines 70-71 (help.Rmd) 
Error: processing vignette 'help.Rmd' failed with diagnostics:
argument "av2" is missing, with no default
--- failed re-building 'help.Rmd'

SUMMARY: processing the following file failed:
  'help.Rmd'

Error: Vignette re-building failed.
Execution halted