Error on npm start

Hello, with that latest bits with react-router-redux, I do see an error that is repeated in the console. The app still seems to run though, so not sure what is happening here:

Warning: Failed propType: Required prop router was not specified in RouterContext. Warning: Failed propType: Required prop location was not specified in RouterContext. Warning: Failed propType: Required prop routes was not specified in RouterContext. Warning: Failed propType: Required prop params was not specified in RouterContext. Warning: Failed propType: Required prop components was not specified in RouterContext. Warning: [react-router] <RouterContext> expects a router rather than a history Unhandled rejection TypeError: Cannot read property ‘listenBeforeLeavingRoute’ of undefined at [object Object].getChildContext (/Users/Troy/Documents/Projects/3ree-master/node_modules/react-router/lib/RouterContext.js:75:35) at [object Object].ReactCompositeComponentMixin._processChildContext (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactCompositeComponent.js:326:53) at [object Object].ReactCompositeComponentMixin.mountComponent (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactCompositeComponent.js:225:100) at [object Object].wrapper as mountComponent at Object.ReactReconciler.mountComponent (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactReconciler.js:37:35) at ReactDOMComponent.ReactMultiChild.Mixin.mountChildren (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactMultiChild.js:241:44) at ReactDOMComponent.Mixin._createContentMarkup (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactDOMComponent.js:591:32) at ReactDOMComponent.Mixin.mountComponent (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactDOMComponent.js:479:29) at Object.ReactReconciler.mountComponent (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactReconciler.js:37:35) at [object Object].ReactCompositeComponentMixin.mountComponent (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactCompositeComponent.js:225:34) at [object Object].wrapper as mountComponent at /Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactServerRendering.js:42:38 at ReactServerRenderingTransaction.Mixin.perform (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/Transaction.js:136:20) at Object.renderToString (/Users/Troy/Documents/Projects/3ree-master/node_modules/react/lib/ReactServerRendering.js:40:24) at app.js:38:35 at /Users/Troy/Documents/Projects/3ree-master/node_modules/react-router/lib/match.js:65:5 From previous event: at handleRender (app.js:16:4) at Layer.handle as handle_request at next (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/route.js:131:13) at Route.dispatch (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/route.js:112:3) at Layer.handle as handle_request at /Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:277:22 at param (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:349:14) at param (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:365:14) at Function.process_params (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:410:3) at next (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:271:10) at jsonParser (/Users/Troy/Documents/Projects/3ree-master/node_modules/body-parser/lib/types/json.js💯40) at Layer.handle as handle_request at trim_prefix (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:312:13) at /Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:280:7 at Function.process_params (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:330:12) at next (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:271:10) at urlencodedParser (/Users/Troy/Documents/Projects/3ree-master/node_modules/body-parser/lib/types/urlencoded.js:88:40) at Layer.handle as handle_request at trim_prefix (/Users/Troy/Documents/Projects/3ree-master/node_modules/express/lib/router/index.js:312:13)

[ryanyogan]

  match({ routes, location: req.url }, (error, redirectLocation, renderProps) => {
    if (error) {
      console.log('Error', error);
      res.status(500).send(error);
    } else if (redirectLocation) {
      res.redirect(302, redirectLocation.pathname + redirectLocation.search);
    } else if (renderProps) {
      const devTools = (isDev) ? <DevTools /> : null;
      const html = renderToString(
        <RouterContext {...renderProps} />
      );
      res.render('index', { isProd: (!isDev), html: html });
    } else {
      res.status(404).send('Not Found');
    }
  });

@GordyD It looks like it is just an issue of keeping up with react-router’s fast moving changes. This is a bit more idiomatic.

[ReganHe]

@ryanyogan is correct.the ‘renderProp’ is not always has value.when it doesn’t, the error reappears.