Angular E2E Testing Script Timeout

I'm new to Angular I created a project with it which is working fine so far. But now I want to add some testing to it.

Unfortunately I'm not able to make it work.

So my app is a basic todo app.

In the test I want to check if task was created.

This is my task-form.po.ts

import { by, element, ElementArrayFinder, ElementFinder } from 'protractor';

export class TaskForm {

  get taskCreateButton(): ElementFinder {
    return element(by.css('#task-create-btn'));
  }

  get taskListItems(): ElementArrayFinder {
    return element.all(by.css('mat-list-item'));
  }

  get taskForm(): ElementFinder {
    return element(by.id('task-form'));
  }

  get taskFormInput(): ElementFinder {
    return element(by.id('mat-input-0'));
  }
}

app.e2e-spec.ts

...

describe('TaskForm', () => {
  let taskForm: TaskForm;
  let startCount: number;
  let createBtn: ElementFinder;
  let taskListItems: ElementArrayFinder;
  let taskFormNewInput: ElementFinder;
  let newTaskItemsNum: number;


  beforeEach( () => {
    taskForm = new TaskForm();
    createBtn = taskForm.taskCreateButton;
    taskListItems = taskForm.taskListItems;
    taskFormNewInput = taskForm.taskFormInput;
    taskListItems.count().then((originalCount: number) => {
      startCount = originalCount;
    });
  });

  it('should enter test task to task form', async () => {
    await taskFormNewInput.clear().then(() => {
      taskFormNewInput.sendKeys('This is a test task');
    });

    taskFormNewInput.getAttribute('value').then(taskInput => {
      expect(taskInput).toEqual('This is a test task');
    });
  });

  it('should add a task', async () => {
    await taskFormNewInput.clear().then(() => {
      taskFormNewInput.sendKeys('This is a test task');
    });

    await createBtn.click();
    newTaskItemsNum = await taskForm.taskListItems.count();
    expect(newTaskItemsNum).toBe(startCount);
  });
});

The task will be added but then it's running in a script timeout.

I tried several things but either the task will not be created or it's running in a script timeout.