[plugin:vite-plugin-vue-i18n] Cannot read property 'message' of undefined

Hello, using latest version of nuxt and @intlify/nuxt3, having this nuxt config

```
intlify: {
localeDir: 'locales', // set the `locales` directory at source directory of your Nuxt application
vueI18n: {
legacy: false,
locale: 'en',
fallbackLocale: 'en',
globalInjection: true,
},
},
```

Info:
```
------------------------------
- Operating System: `Darwin`
- Node Version: `v14.17.0`
- Nuxt Version: `3.0.0-27277498.850ef69`
- Package Manager: `yarn@1.22.17`
- Bundler: `Vite`
- User Config: `target`, `head`, `css`, `loading`, `publicRuntimeConfig`, `plugins`, `components`, `buildModules`, `modules`, `intlify`, `pwa`, `sanity`, `gtm`, `sitemap`, `robots`
- Runtime Modules: `@nuxtjs/robots@2.5.0`
- Build Modules: `nuxt-windicss@2.0.12`, `@intlify/nuxt3@0.1.8`
------------------------------
```

and a folder `locales` with a file called it.json and en.json I got the following error:

```
[plugin:vite-plugin-vue-i18n] Cannot read property 'message' of undefined
/Users/lorenzo/secretproject/locales/it.json
at Object.newOptions.onError (/Users/lorenzo/secretproject/node_modules/@intlify/bundle-utils/lib/codegen.js:102:48)
at Object.newOptions.onError (/Users/lorenzo/secretproject/node_modules/@intlify/bundle-utils/lib/codegen.js:102:36)
at newOptions.onError (/Users/lorenzo/secretproject/node_modules/@intlify/bundle-utils/lib/codegen.js:102:36)
at emitError (/Users/lorenzo/secretproject/node_modules/@intlify/message-compiler/dist/message-compiler.cjs.js:845:13)
at parseLinked (/Users/lorenzo/secretproject/node_modules/@intlify/message-compiler/dist/message-compiler.cjs.js:979:17)
at parseMessage (/Users/lorenzo/secretproject/node_modules/@intlify/message-compiler/dist/message-compiler.cjs.js:1036:36)
at parseResource (/Users/lorenzo/secretproject/node_modules/@intlify/message-compiler/dist/message-compiler.cjs.js:1075:25)
at Object.parse (/Users/lorenzo/secretproject/node_modules/@intlify/message-compiler/dist/message-compiler.cjs.js:1090:21)
at Object.baseCompile (/Users/lorenzo/secretproject/node_modules/@intlify/message-compiler/dist/message-compiler.cjs.js:1402:24)
at Object.generateMessageFunction (/Users/lorenzo/secretproject/node_modules/@in
```

Of course I am not seeing translated content if I dismiss the error.

Thanks for help,
L.