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

Quitting from introduction.Rmd:23-37 [setup]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! package or namespace load failed for 'kableExtra' in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called 'systemfonts'
---
Backtrace:
    ▆
 1. └─base::library(kableExtra)
 2.   └─base::tryCatch(...)
 3.     └─base (local) tryCatchList(expr, classes, parentenv, handlers)
 4.       └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
 5.         └─value[[3L]](cond)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'introduction.Rmd' failed with diagnostics:
package or namespace load failed for 'kableExtra' in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called 'systemfonts'
--- failed re-building ‘introduction.Rmd’

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

Quitting from rmarkdown.Rmd:300-307 [unnamed-chunk-11]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! package or namespace load failed for 'kableExtra' in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called 'systemfonts'
---
Backtrace:
    ▆
 1. └─base::library(kableExtra)
 2.   └─base::tryCatch(...)
 3.     └─base (local) tryCatchList(expr, classes, parentenv, handlers)
 4.       └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
 5.         └─value[[3L]](cond)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'rmarkdown.Rmd' failed with diagnostics:
package or namespace load failed for 'kableExtra' in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called 'systemfonts'
--- failed re-building ‘rmarkdown.Rmd’

SUMMARY: processing the following files failed:
  ‘introduction.Rmd’ ‘rmarkdown.Rmd’

Error: Vignette re-building failed.
Execution halted