Error(s) in re-building vignettes:
--- re-building 'multifunc_biodepth.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

Loading required package: carData

Attaching package: 'car'

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

    some

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

    recode

Note: Using an external vector in selections is ambiguous.
ℹ Use `all_of(german_vars)` instead of `german_vars` to silence this message.
ℹ See <https://tidyselect.r-lib.org/reference/faq-external-vector.html>.
This message is displayed once per session.
`geom_smooth()` using formula 'y ~ x'
`summarise()` has grouped output by 'variable'. You can override using the
`.groups` argument.
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Quitting from lines 443-500 (multifunc_biodepth.Rmd) 
Error: processing vignette 'multifunc_biodepth.Rmd' failed with diagnostics:
number of characters is not computable in "bytes" encoding, element 1
--- failed re-building 'multifunc_biodepth.Rmd'

--- re-building 'multifunc_eff_num_func.Rmd' using rmarkdown
`geom_smooth()` using formula 'y ~ x'
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
`geom_smooth()` using formula 'y ~ x'
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
`geom_smooth()` using formula 'y ~ x'
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
Warning: Removed 3 rows containing missing values (geom_segment).
--- finished re-building 'multifunc_eff_num_func.Rmd'

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

Error: Vignette re-building failed.
Execution halted