First, remove the store.subscribe call from src/index.jsx. We no longer need this as connect will take care of subscribing to changes to the state. This also means we no longer need to wrap our ReactDOM.render call inside a function.
Next, since we will be calling connect within each component, there’s no need to pass the store and the state properties as props. Therefore, in our <Route> components, switch back to using the component prop instead of render.
Most importantly, wrap our entire application with the <Provider> component, passing the store as its only prop:
import { Provider } from 'react-redux'; ReactDOM.render(( <Provider store={store}> <BrowserRouter> <Switch> <Route exact path="/register" ...
