shiki highlighter not working for non-default languages causes 404

[PGimenez]

If I try to highlight a language other than the default like html or js, the site stops working and it can't be built. The browser shows a 404:

{
  "statusCode": 404,
  "statusMessage": "Cannot find any path matching /.",
  "stack": []
}

To attempt to debug this, I've started a docus project from scratch with npx nuxi@latest init docs -t themes/docus and added a snippet to the index page

```julia
if end
```
```rust
if end
```

This is my nuxt.config.ts:

export default defineNuxtConfig({
    // https://github.com/nuxt-themes/docus
    extends: '@nuxt-themes/docus',
    devtools: { enabled: true },
    content: {
        highlight: {
            theme: {
                dark: "github-dark",
                default: "github-light",
            },
            preload: ["julia", "rust"],
        },
    },
    modules: [
        // Remove it if you don't use Plausible analytics
        // https://github.com/nuxt-modules/plausible
        '@nuxtjs/plausible'
    ]
})

And this is the error I'm getting when npm run dev

[nuxt] [request error] [unhandled] [500] No grammar provided for <source.rust>
  at a (./node_modules/shikiji/dist/core.mjs:434:15520)
  at t.ScopeDependencyProcessor.processQueue (./node_modules/shikiji/dist/core.mjs:434:17212)
  at Registry._loadGrammar (./node_modules/shikiji/dist/core.mjs:434:30884)
  at async Registry.loadLanguage (./node_modules/shikiji/dist/core.mjs:549:15)
  at async Registry.loadLanguages (./node_modules/shikiji/dist/core.mjs:573:7)
  at async Object.loadLanguage (./node_modules/shikiji/dist/core.mjs:682:5)
  at Object.getHighlightedAST (./node_modules/@nuxtjs/mdc/dist/runtime/shiki/highlighter.mjs:44:7)
  at <anonymous> (./node_modules/@nuxtjs/mdc/dist/runtime/shiki/event-handler.mjs:16:12)
  at async Object.handler (./node_modules/h3/dist/index.mjs:1630:19)
  at async toNodeHandle (./node_modules/h3/dist/index.mjs:1840:7)
[nitro] [unhandledRejection] FetchError: [GET] "/api/_mdc/highlight?code=if+end%0A&lang=rust&theme=%7B%22default%22:%22github-light%22,%22dark%22:%22github-dark%22%7D&highlights=%5B%5D": 500
    at runNextTicks (node:internal/process/task_queues:60:5)
    at process.processImmediate (node:internal/timers:449:9)
    at async $fetchRaw2 (file:///Users/pere/genie/docs/docs/node_modules/ofetch/dist/shared/ofetch.00501375.mjs:256:14)
    at async $fetch2 (file:///Users/pere/genie/docs/docs/node_modules/ofetch/dist/shared/ofetch.00501375.mjs:261:15)
    at async Promise.all (index 1)
    at <anonymous> (/Users/pere/genie/docs/docs/node_modules/@nuxtjs/mdc/dist/runtime/parser/shiki.mjs:50:7)

It seems that the error is related to grammar files, but I don't know how to fix it. I've tried downgrading to earlier shiki versions but that didn't fix it.

[McSneaky]

Run into same issue. Decided to just drop syntax highlight

Wasted already whole week trying to get company docs up and running again, coz of different Nuxt and Docus bugs :|

[PGimenez]

I ended up switching to highlightjs. I tried following the markdown highlighter instructions but couldn't make it work, so I ended up modifying the default template to call highlightjs after the page is loaded.

<script lang="ts" setup>
import { onMounted } from 'vue';
import hljs from 'highlight.js'; // Import highlight.js if needed

onMounted(() => {
    console.log("mounted")
    document.querySelectorAll('pre code').forEach((block) => {
        hljs.highlightBlock(block);
    });
});
</script>

<template>
    <DocsPageLayout>
        <slot />
    </DocsPageLayout>
</template>

<style>
.hljs {
    width: 100%
}
</style>

[ariesmaulana]

I got a similar issue, after upgrading docus theme to (v1.14.9) it fix the issue

return

at Object.getHighlightedAST (./node_modules/@nuxtjs/mdc/dist/runtime/shiki/highlighter.mjs:44:7)  
  at <anonymous> (./node_modules/@nuxtjs/mdc/dist/runtime/shiki/event-handler.mjs:16:12)  
  at async Object.handler (./node_modules/h3/dist/index.mjs:1630:19)  
  at async toNodeHandle (./node_modules/h3/dist/index.mjs:1840:7)
[nuxt] [request error] [unhandled] [500] No grammar provided for <source.python>

after upgrade, no more issue