i have a div in my react component and im importing some class name from a class css file, but the class name is not getting integrated to the main
If you're using Windows, don't name file 'Aux' it's reserved name.
Solution is just to name your CSS files as (in your case) Layout.module.css and then import them as such.
Layout.module.css
You don't need to eject as from the Create React App 2.0 since it uses CSS Modules out of the box.