### Bug description

quarto 1.3.26, Windows, RStudio Desktop. Make sure you reset everything to see the warning, when run multiple times it does not show.


index.qmd (nothing else)

````

```{r}
library(flextable)
head(mtcars)[,1:6]  |>
  flextable() 
```

````

Background job output on build:

```

Rendering:
[1/1] index.qmd
[WARNING] Could not fetch resource site_libs/tabwid-1.1.2/tabwid.css

Watching files for changes
Browse at http://localhost:6698/
GET: /
  /site_libs/tabwid-1.1.2/tabwid.css (404: Not Found)

```


### Checklist

- [X] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [X] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] Please document the operating system you're running. If on Linux, please provide the specific distribution.
cscheid
2022-12-22T08:09:41Z
dmenne
bug needs-repro
v1.3
closed
Could not fetch resource site_libs/tabwid-1.1.2/tabwid.css
https://github.com/quarto-dev/quarto-cli/issues/3734