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

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

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

--- re-building ‘sampleSize_parallel_2A1E.Rmd’ using rmarkdown
--- finished re-building ‘sampleSize_parallel_2A1E.Rmd’

--- re-building ‘sampleSize_parallel_2A3E.Rmd’ using rmarkdown

Quitting from sampleSize_parallel_2A3E.Rmd:27-36 [unnamed-chunk-1]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `loadNamespace()`:
! there is no package called 'systemfonts'
---
Backtrace:
     ▆
  1. └─base::loadNamespace(x)
  2.   ├─base::namespaceImportFrom(...)
  3.   │ └─base::asNamespace(ns)
  4.   └─base::loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]])
  5.     ├─base::namespaceImportFrom(...)
  6.     │ └─base::asNamespace(ns)
  7.     └─base::loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]])
  8.       └─base::withRestarts(stop(cond), retry_loadNamespace = function() NULL)
  9.         └─base (local) withOneRestart(expr, restarts[[1L]])
 10.           └─base (local) doWithOneRestart(return(expr), restart)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'sampleSize_parallel_2A3E.Rmd' failed with diagnostics:
there is no package called 'systemfonts'
--- failed re-building ‘sampleSize_parallel_2A3E.Rmd’

--- re-building ‘sampleSize_parallel_3A1E.Rmd’ using rmarkdown
--- finished re-building ‘sampleSize_parallel_3A1E.Rmd’

--- re-building ‘sampleSize_parallel_3A3E.Rmd’ using rmarkdown

Quitting from sampleSize_parallel_3A3E.Rmd:29-41 [inputdata]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `loadNamespace()`:
! there is no package called 'systemfonts'
---
Backtrace:
     ▆
  1. └─base::loadNamespace(x)
  2.   ├─base::namespaceImportFrom(...)
  3.   │ └─base::asNamespace(ns)
  4.   └─base::loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]])
  5.     ├─base::namespaceImportFrom(...)
  6.     │ └─base::asNamespace(ns)
  7.     └─base::loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]])
  8.       └─base::withRestarts(stop(cond), retry_loadNamespace = function() NULL)
  9.         └─base (local) withOneRestart(expr, restarts[[1L]])
 10.           └─base (local) doWithOneRestart(return(expr), restart)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'sampleSize_parallel_3A3E.Rmd' failed with diagnostics:
there is no package called 'systemfonts'
--- failed re-building ‘sampleSize_parallel_3A3E.Rmd’

SUMMARY: processing the following files failed:
  ‘sampleSize_parallel_2A3E.Rmd’ ‘sampleSize_parallel_3A3E.Rmd’

Error: Vignette re-building failed.
Execution halted