Interactive code only works as localhost

Hello,

with my YAML
 ---
format: live-html
engine: knitr
---

{{< include ./_extensions/r-wasm/live/_knitr.qmd >}}

```{webr}
for (x in 1:5) {
  print(x ** 2)
}
```

I can only get interactive code blocks when I open the file as a localhost, but not as a HTML-file. Do you know, what is wrong with that?