My Protractor Script Error - Object Expected

Im learning the automation testing for angularjs application but im encounter object expected error on line 4 which point to first line of my script.

describe("Homepage", function() {
    it("Navigate to homepage", function(){
        browser.get("http://www.way2automation.com/angularjs-protractor/banking/#/login");
    });
});

exports.config = {
    framework: 'jasmine',
    seleniumAddress: 'http://localhost:4444/wd/hub',
    specs: ['protractor.js'] 
}

Please help. Thanks.

from My Protractor Script Error - Object Expected