Además, al importar reactDom desde "react-dom", me da un error

por ejemplo import { ReactDOM } from "react-dom"

Da el error: ReactDOM' is not exported from 'react-dom' (imported as 'ReactDOM').

índice.js

 import React from "react" import { ReactDOM } from "react-dom" import App from "./App" import "./index.css" ReactDOM.render( <App/>,document.querySelector("#root"))

Aplicación.jsx

 import React from 'react' const App = () => { return ( <div>Hello maaaannnnnnnnnn!!!!</div> ) } export default App

índice.css

 body{ background: black; color: white; }

Error en la consola de depuración: Cannot read properties of undefined (reading 'render')