Instale los últimos NPM para React
npm install react-scripts@latest
Tarik
npm install react-scripts@latest//Is used to update the version only such as 16.0.0 can be update to latest 16.13.0 but..
//but.. 15.0.0 can't be updated to 16.13.0 or to 16.0.0 with this
npm update react
//Use this to go from 15.0.0 to 16.13.0
npm install --save react@latestnpx create-react-app my-app
cd my-app
npm startnpm install -g react-cli react
npm i react react-dom //They both are important when developing with react