Error(s) in re-building vignettes:
  ...
--- re-building ‘viztest_intro.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/VizTest.Rcheck/vign_test/VizTest/vignettes/viztest_intro_files/figure-html/reg-plot-both-1.png
672x336 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 11890 bytes
Input file size = 12760 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10747
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 10706
  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 = 1  f = 0		IDAT size = 10706

Output IDAT size = 10706 bytes (1184 bytes decrease)
Output file size = 10784 bytes (1976 bytes = 15.49% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/VizTest.Rcheck/vign_test/VizTest/vignettes/viztest_intro_files/figure-html/mltlvl-obj-plot-1.png
480x336 pixels, 8 bits/pixel, 235 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 4788 bytes
Input file size = 5583 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4145
  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 = 4145

Output IDAT size = 4145 bytes (643 bytes decrease)
Output file size = 4223 bytes (1360 bytes = 24.36% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/VizTest.Rcheck/vign_test/VizTest/vignettes/viztest_intro_files/figure-html/avt-preds-plot-1.png
480x336 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 8321 bytes
Input file size = 9191 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7376
  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 = 7376

Output IDAT size = 7376 bytes (945 bytes decrease)
Output file size = 7454 bytes (1737 bytes = 18.90% decrease)


Quitting from viztest_intro.Rmd:343-348 [unnamed-chunk-2]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! Package `mvtnorm` required for this function to work.
  Please install it by running `install.packages("mvtnorm")`.
---
Backtrace:
    ▆
 1. ├─... %>% inferences(method = "simulation", R = 2500)
 2. └─marginaleffects::inferences(., method = "simulation", R = 2500)
 3.   └─marginaleffects:::inferences_simulation(...)
 4.     └─insight::check_if_installed("mvtnorm")
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'viztest_intro.Rmd' failed with diagnostics:
Package `mvtnorm` required for this function to work.
  Please install it by running `install.packages("mvtnorm")`.
--- failed re-building ‘viztest_intro.Rmd’

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

Error: Vignette re-building failed.
Execution halted