node.js – 在快捷框架中的会话中得到奇怪的错误

// Module dependencies.
var application_root = __dirname,express = require( 'express' ),//Web framework
path = require( 'path' ),//Utilities for dealing with file paths
mongoose = require( 'mongoose' ); //MongoDB integration

//Create server
var app = express();

// Configure server
app.configure( function() {

app.use( express.bodyParser() );
app.use( express.methodOverride() );
app.use( app.router );
app.use(express.session({secret:'thisismysupersecret'}));
app.use( express.static( path.join( application_root,'site') ) );
app.use( express.errorHandler({ dumpExceptions: true,showStack: true }));
});
app.post("/verifyLogin",function(request,responsE){
var usr=request.body.username;
var pass=request.body.password;
//request.session.email=usr;
response.redirect('dashboard');
});

//Start server
var port = 3000;
app.listen( port,function() {
console.log( 'Express server listening on port %d in %s mode',port,app.setTings.env);
});

当我导航到localhost：3000我得到这个错误

问题在哪里？