In a A typical application's Userview, the absolute minimum elements that you should have in your Userview would be the Run Process and the userview should at least have a Run Process element and an Inbox element. However, you may also want to add in a an HTML Page element to serve as well that serves as a landing page for your portal.
Figure 1: Typical Userview Design in Preview
Figure 2: Typical Userview Design in Userview Builder