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

--- re-building ‘html.Rmd’ using rmarkdown
Quitting from lines 37-49 (html.Rmd) 
Error: processing vignette 'html.Rmd' failed with diagnostics:
Columns 1, 2 must not have names of the form ... or ..j.
Backtrace:
     █
  1. ├─tools:::.buildOneVignette(...)
  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. └─rowspan %>% read_html() %>% as_cells()
 27.   ├─base::withVisible(eval(quote(`_fseq`(`_lhs`)), env, env))
 28.   └─base::eval(quote(`_fseq`(`_lhs`)), env, env)
 29.     └─base::eval(quote(`_fseq`(`_lhs`)), env, env)
 30.       └─global::`_fseq`(`_lhs`)
 31.         └─magrittr::freduce(value, `_function_list`)
 32.           ├─base::withVisible(function_list[[k]](value))
 33.           └─function_list[[k]](value)
 34.             ├─unpivotr::as_cells(.)
 35.             └─unpivotr:::as_cells.xml_document(.)
 36.               └─base::lapply(tables, as_cells)
 37.                 ├─unpivotr:::FUN(X[[i]], ...)
 38.                 └─unpivotr:::as_cells.xml_node(X[[i]], ...)
 39.                   └─tibble::as_data_frame(out)
 40.                     ├─tibble::as_tibble(x, ...)
 41.                     └─tibble:::as_tibble.list(x, ...)
 42.                       └─tibble:::lst_to_tibble(x, .rows, .name_repair, col_lengths(x))
 43.                         └─tibble:::set_repaired_names(x, .name_repair)
 44.                           ├─rlang::set_names(x, repaired_names(names(x), .name_repair = .name_repair))
 45.                           │ └─rlang:::set_names_impl(x, x, nm, ...)
 46.                           │   └─rlang::is_function(nm)
 47.                           │     └─rlang::is_closure(x)
 48.                           └─tibble:::repaired_names(names(x), .name_repair = .name_repair)
 49.                             └─tibble:::check_unique(new_name)
--- failed re-building ‘html.Rmd’

--- re-building ‘small-multiples.Rmd’ using rmarkdown
--- finished re-building ‘small-multiples.Rmd’

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

Error: Vignette re-building failed.
Execution halted