Custom fields in SAP Fiori Demo Cloud Edition

Hi all,

I was trying to add a new field in the object "my tasks" following this guide:

Add a custom field: An example on SAP Fiori Demo Cloud Edition

First I created a new extension project choosing 'my task' from CRM to extend

I went to the screen that I want to edit (in Extensibility mode) and choosed for Extend -> Extend View/Fragment

A new XML file was created in my view folder and I opened this

I was trying to add a new field but I saw that I'm unable to choose a Odata service in the project.

The dropdown menu is also greyed out so I'm not able to choose a Odata service.

Is there something wrond I did in my steps?

Thanks in advance!