creating a new lambda function with given example give me error

[snehav27]

Running the code given in the example gives me following error:

START RequestId: Version: $LATEST
2017-02-02T14:44:50.818Z	undefined	Server has started
2017-02-02T14:44:50.954Z	2691b0b8-e956-11e6-b670-3b17248e661b	Error: SecurityError: Request method not allowed
    at openOnSocket (/var/task/node_modules/xmlhttprequest-socket/lib/XMLHttpRequest.js:191:13)
    at eventHandler.sendRequest (/**var/task/node_modules/lampress/index.js:64:11**)
    at eventHandler.handle (/var/task/node_modules/lampress/index.js:23:10)
    at /var/task/node_modules/lampress/index.js:87:13
END RequestId: 2691b0b8-e956-11e6-b670-3b17248e661b
REPORT RequestId: 2691b0b8-e956-11e6-b670-3b17248e661b	Duration: 199.82 ms	Billed Duration: 200 ms 	Memory Size: 128 MB	Max Memory Used: 24 MB	
 Process exited before completing request

Is it something do with the port?

Followed documentation: https://www.npmjs.com/package/lampress

package.json:
"lampress": "^1.1.1"

Code:

var port = process.env.PORT || 5000;
app.listen(port, function() {
  console.log("Server has started");
});

exports.handler = lampress(port, server);