react-router reactjs

react-router 4.1.1 returning 404’s

I’ve just upgraded to “react-router”: “^4.1.1” and now I’m getting 404’s from all routes except the default route. Not sure what I’m missing here?

Any assistance is appreciated.

import React, { Component } from 'react'
import ReactDOM from 'react-dom'
import { BrowserRouter, Route, Switch } from 'react-router-dom'
import Tee from './components/Tee'
import About from './components/About'
import Home from './components/Home'
class App extends Component {
render() {
return (
<Route exact path="/" component={Home} />
<Route path="/about" component={About} />
<Route path="/tee" component={Tee} />
export default App;
<App />