The path you cd'ed into from the terminal has different capitalization than the real path, see that one has "Client" and the other "client".

D:\Projets\Roster's\Client\node_modules\eslint-config-react-app\base.js D:\Projets\Roster's\client\node_modules\eslint-config-react-app\base.js

You should check that when you cd into the directory, you use the same exact capitalization as the real path.

I had the same problem, and this is what solved it for me.

try

solution 1 : save your package file (ctrl + s).

solution 2: npm uninstall eslint-config-react-app or yarn remove eslint-config-react-app

then

npm i eslint-config-react-app@6 or yarn add eslint-config-react-app@6