Cannot load CSS modules, proxy file error

[radencode]

"snowpack": "^2.17.0",
"@snowpack/plugin-sass": "^1.1.1",

Setup a new app using npx
npx create-snowpack-app snowpack --template @snowpack/app-template-react-typescript
npm install @snowpack/plugin-sass --save-dev

Add sass file
app.sass

.test
  width: 30px
  height: 30px
  background: red

App.tsx
import styles from './app.sass'
<div className={styles.test}/>

Snowpack devOptions

port: 8005,
open: 'none',
bundle: false,
out: 'dist'

Run snowpack dev
npm start => snowpack dev

Error
SyntaxError: The requested module './app.css.proxy.js' does not provide an export named 'default'