Version

3.0.0

Reproduction link

[](FE: https://github.com/simple5960/minimal-fe BE:https://github.com/simple5960/minimal-be)

Steps to reproduce

1. Start the back-end
2. Start the front-end
3. open http://localhost:9000
4. The third path of proxy in vue.config.js cannot be deputized

What is expected?

The third path of proxy in vue.config.js should be deputized

What is actually happening?

The third path of proxy in vue.config.js cannot be deputized