Symfony version(s) affected

7.3.0

Description

In my app.css, I put

@import './test.css';

and in test.css:

body {
    background-color: red;
}

And the background is still white

=> My browser try to load https://127.0.0.1:8000/assets/styles/test.css, but faces a 404.

I'm using symfony-cli, but it's the same with caddy

How to reproduce

See this repo