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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data CONFESS
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* checking for file ‘CONFESS/DESCRIPTION’ ... OK
* preparing ‘CONFESS’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘vignette.Rmd’ using rmarkdown
2024-06-09 19:52:57.913 R[24578:32306872] XType: Using static font registry.
--- finished re-building ‘vignette.Rmd’

--- re-building ‘vignette_tex.Rnw’ using knitr
Error: processing vignette 'vignette_tex.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'vignette_tex.tex' failed.
LaTeX errors:
! Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Emergency stop.
 ...                                              
                                                  
l.49 ...}{rgb}{0.941, 0.941, 0.941}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘vignette_tex.Rnw’

SUMMARY: processing the following file failed:
  ‘vignette_tex.Rnw’

Error: Vignette re-building failed.
Execution halted