Cannot find package 'element-plus' even though installed

[tony19]

Description of Bug

I installed element-plus and tried to import it, but StackBlitz throws this error:

Can't find package: element-plus

I also tried clicking the "Install Package: element-plus" button that's presented, but to no avail.

https://stackblitz.com/edit/stackblitz-element-plus-bug-demo

Steps to Reproduce

1. Open Vue 3 Starter project.
2. Add element-plus through the Dependencies panel on the left.
3. In src/main.js, add this code:

import ElementPlus from 'element-plus';
import 'element-plus/lib/theme-chalk/index.css';

4. See the error in the preview panel.

Expected Behavior

The element-plus package is found and no error occurs.

Screenshots/Screencast

Additional Context/Questions

• macOS BigSur
• Chrome 91

[Jogiter]

got same error