Click not working on ion-button (e2e)

I 'm developing an Ionic 3 PWA (using lazy load). The tests was based on this example. I'm trying to do e2e tests.

My initial test is try to fill a form and click in the submit button of a login screen. I can select the button, altought the click event doesn't works. It should show an error message if the input are empty.

My test:
```

import { browser, by, WebElementPromise } from 'protractor';

describe('App', () => {

beforeEach(() => {

});

describe('default screen', () => {
beforeEach(() => {
browser.navigateTo('http://10.0.1.63:8100/#/login');
});

it('It must work', () => {
browser.findElement(by.css('#login-button')).then(function (element) {
element.click().then(function (clickResult) {
console.log(clickResult) // it logs null
}).catch(function (error) {
console.error('ERROr ON CLICK', error)
});
}).catch(function (error: Error) {
console.error('ERROR ON FIND ELEMENT', error)
});
});

})
});

```
```
Package.json:
{
"name": "ionic-unit-testing-example",
"author": "Ionic Framework",
"homepage": "https://ionicframework.com/",
"private": true,
"scripts": {
"clean": "ionic-app-scripts clean",
"build": "ionic-app-scripts build",
"ionic:build": "ionic-app-scripts build",
"ionic:serve": "ionic-app-scripts serve",
"test": "karma start ./test-config/karma.conf.js",
"test-ci": "karma start ./test-config/karma.conf.js --single-run",
"e2e": "webdriver-manager update --standalone false --gecko false; protractor ./test-config/protractor.conf.js"
},
"dependencies": {
"@angular/common": "4.1.2",
"@angular/compiler": "4.1.2",
"@angular/compiler-cli": "4.1.2",
"@angular/core": "4.1.2",
"@angular/forms": "4.1.2",
"@angular/http": "4.1.2",
"@angular/platform-browser": "4.1.2",
"@angular/platform-browser-dynamic": "4.1.2",
"@ionic-native/core": "3.12.1",
"@ionic-native/splash-screen": "3.12.1",
"@ionic-native/status-bar": "3.12.1",
"@ionic/storage": "2.0.1",
"ionic-angular": "3.3.0",
"ionicons": "3.0.0",
"rxjs": "5.1.1",
"sw-toolbox": "3.4.0",
"zone.js": "0.8.11"
},
"devDependencies": {
"@ionic/app-scripts": "1.3.7",
"@ionic/cli-plugin-ionic-angular": "1.4.1",
"@types/jasmine": "^2.5.41",
"@types/node": "^7.0.8",
"angular2-template-loader": "^0.6.2",
"html-loader": "^0.4.5",
"ionic": "3.7.0",
"jasmine": "^2.5.3",
"jasmine-spec-reporter": "^4.1.0",
"karma": "^1.5.0",
"karma-chrome-launcher": "^2.0.0",
"karma-jasmine": "^1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-sourcemap-loader": "^0.3.7",
"karma-webpack": "^2.0.3",
"null-loader": "^0.1.1",
"protractor": "^5.1.1",
"ts-loader": "^2.0.3",
"ts-node": "^3.0.2",
"typescript": "2.3.3"
},
"version": "0.0.1",
"description": "An Ionic project"
}

```