title: ERROR:Attempted import error: 'Prompt' is not exported from 'react-router'
body: <p>When I processed project with command:'npm start',I got the following error message,how to resolve the error?
  ./node_modules/react-router-dom/esm/react-router-dom.js
  Attempted import error: 'Prompt' is not exported from 'react-router'.</p>