Error(s) in re-building vignettes:
  ...
--- re-building ‘Explainable_Outlier_Detection_in_Titanic_dataset.Rmd’ using rmarkdown

Quitting from lines 33-42 [unnamed-chunk-2] (Explainable_Outlier_Detection_in_Titanic_dataset.Rmd)
Error: processing vignette 'Explainable_Outlier_Detection_in_Titanic_dataset.Rmd' failed with diagnostics:
there is no package called 'kableExtra'
--- failed re-building ‘Explainable_Outlier_Detection_in_Titanic_dataset.Rmd’

--- re-building ‘Introducing_OutlierTree.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/outliertree.Rcheck/vign_test/outliertree/vignettes/Introducing_OutlierTree_files/figure-html/unnamed-chunk-4-1.png
480x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 14438 bytes
Input file size = 14528 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 11901
  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 = 11901

Output IDAT size = 11901 bytes (2537 bytes decrease)
Output file size = 11979 bytes (2549 bytes = 17.55% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/outliertree.Rcheck/vign_test/outliertree/vignettes/Introducing_OutlierTree_files/figure-html/unnamed-chunk-5-1.png
480x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 17328 bytes
Input file size = 17430 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14086
  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 = 14086

Output IDAT size = 14086 bytes (3242 bytes decrease)
Output file size = 14164 bytes (3266 bytes = 18.74% decrease)

--- finished re-building ‘Introducing_OutlierTree.Rmd’

SUMMARY: processing the following file failed:
  ‘Explainable_Outlier_Detection_in_Titanic_dataset.Rmd’

Error: Vignette re-building failed.
Execution halted