Package check result: ERROR

Check: re-building of vignette outputs, Result: ERROR
  Error(s) in re-building vignettes:
    ...
  --- re-building ‘examples.Rmd’ using rmarkdown
  
  Quitting from examples.Rmd:48-71 [bar1]
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  <error/rlang_error>
  Error in `loadNamespace()`:
  ! there is no package called 'tintin'
  ---
  Backtrace:
      ▆
   1. └─base::loadNamespace(x)
   2.   └─base::withRestarts(stop(cond), retry_loadNamespace = function() NULL)
   3.     └─base (local) withOneRestart(expr, restarts[[1L]])
   4.       └─base (local) doWithOneRestart(return(expr), restart)
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  Error: processing vignette 'examples.Rmd' failed with diagnostics:
  there is no package called 'tintin'
  --- failed re-building ‘examples.Rmd’
  
  SUMMARY: processing the following file failed:
    ‘examples.Rmd’
  
  Error: Vignette re-building failed.
  Execution halted