@vitejs/plugin-react can't detect preamble. Something is wrong.

I have created a project, https://github.com/Back2Dev/vite-react-meteor

The purpose of which is to use vite with Meteor and take advantage of the faster load times.

I hit a problem with this error message:

```
@vitejs/plugin-react can't detect preamble. Something is wrong. See https://github.com/vitejs/vite-plugin-react/pull/11#discussion_r430879201
at Hello.jsx:6:1
```

I found something (related to the same error coming from Cypress) that suggested this in the vite.config.js

```
export default defineConfig({
plugins: [
react({
// Disabling refresh stops the error, but that's kind of pointless
// include: "**/*.disabled",
}),
],
```
Which means that the page now loads, but does not refresh