Error(s) in re-building vignettes:
  ...
--- re-building ‘debiasing-vignette.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/mlr3fairness.Rcheck/vign_test/mlr3fairness/vignettes/debiasing-vignette_files/figure-html/unnamed-chunk-7-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 13804 bytes
Input file size = 13894 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10650
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10650

Output IDAT size = 10650 bytes (3154 bytes decrease)
Output file size = 10728 bytes (3166 bytes = 22.79% decrease)

--- finished re-building ‘debiasing-vignette.Rmd’

--- re-building ‘measures-vignette.Rmd’ using rmarkdown

Quitting from lines 75-77 [unnamed-chunk-4] (measures-vignette.Rmd)
Error: processing vignette 'measures-vignette.Rmd' failed with diagnostics:
The following packages could not be loaded: ranger
--- failed re-building ‘measures-vignette.Rmd’

--- re-building ‘reports-vignette.Rmd’ using rmarkdown

Quitting from lines 52-54 [build_modelcard_example_for_vignette] (reports-vignette.Rmd)
Error: processing vignette 'reports-vignette.Rmd' failed with diagnostics:
there is no package called 'posterdown'
--- failed re-building ‘reports-vignette.Rmd’

--- re-building ‘visualization-vignette.Rmd’ using rmarkdown

Quitting from lines 41-45 [unnamed-chunk-3] (visualization-vignette.Rmd)
Error: processing vignette 'visualization-vignette.Rmd' failed with diagnostics:
The following packages could not be loaded: ranger
--- failed re-building ‘visualization-vignette.Rmd’

SUMMARY: processing the following files failed:
  ‘measures-vignette.Rmd’ ‘reports-vignette.Rmd’
  ‘visualization-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted