Error(s) in re-building vignettes:
  ...
--- re-building ‘introduction.Rmd’ using rmarkdown
Quitting from lines 310-314 (introduction.Rmd) 
Error: processing vignette 'introduction.Rmd' failed with diagnostics:
No common type for `..1$dmr$version_nmbr` <double> and `..2$dmr$version_nmbr` <character>.
Backtrace:
     █
  1. ├─tools:::buildVignettes(...)
  2. │ ├─base::tryCatch(...)
  3. │ │ └─base:::tryCatchList(expr, classes, parentenv, handlers)
  4. │ │   └─base:::tryCatchOne(expr, names, parentenv, handlers[[1L]])
  5. │ │     └─base:::doTryCatch(return(expr), name, parentenv, handler)
  6. │ └─engine$weave(file, quiet = quiet, encoding = enc)
  7. │   └─knitr:::vweave_rmarkdown(...)
  8. │     └─rmarkdown::render(...)
  9. │       └─knitr::knit(...)
 10. │         └─knitr:::process_file(text, output)
 11. │           ├─base::withCallingHandlers(...)
 12. │           ├─knitr:::process_group(group)
 13. │           └─knitr:::process_group.block(group)
 14. │             └─knitr:::call_block(x)
 15. │               └─knitr:::block_exec(params)
 16. │                 ├─knitr:::in_dir(...)
 17. │                 └─knitr:::evaluate(...)
 18. │                   └─evaluate::evaluate(...)
 19. │                     └─evaluate:::evaluate_call(...)
 20. │                       ├─evaluate:::timing_fn(...)
 21. │                       ├─base:::handle(...)
 22. │                       ├─base::withCallingHandlers(...)
 23. │                       ├─base::withVisible(eval(expr, envir, enclos))
 24. │                       └─base::eval(expr, envir, enclos)
 25. │                         └─base::eval(expr, envir, enclos)
 26. ├─tidyr::unnest(df)
 27. │ ├─tidyr::unnest(...)
 28. │ └─tidyr:::unnest.data.frame(...)
 29. │   └─tidyr::unchop(data, !!cols, keep_empty = keep_empty, ptype = ptype)
 30. │     └─vctrs::vec_rbind(!!!x, .ptype = ptype)
 31. ├─vctrs:::vec_type2_dispatch(x = x, y = y, x_arg = x_arg, y_arg = y_arg)
 32. ├─vctrs:::vec_ptype2.tbl_df(x = x, y = y, x_arg = x_arg, y_arg = y_arg)
 33. ├─vctrs:::vec_ptype2.tbl_df.data.frame(...)
 34. ├─vctrs:::vec_type2_dispatch(x = x, y = y, x_arg = x_arg, y_arg = y_arg)
 35. ├─vctrs::vec_ptype2.double(x = x, y = y, x_arg = x_arg, y_arg = y_arg)
 36. └─vctrs:::vec_ptype2.double.default(...)
 37.   └─vctrs::vec_default_ptype2(x, y, x_arg = x_arg, y_arg = y_arg)
 38.     └─vctrs::stop_incompatible_type(x, y, x_arg = x_arg, y_arg = y_arg)
 39.       └─vctrs:::stop_incompatible(...)
 40.         └─vctrs:::stop_vctrs(...)
--- failed re-building ‘introduction.Rmd’

SUMMARY: processing the following file failed:
  ‘introduction.Rmd’

Error: Vignette re-building failed.
Execution halted