What I have done:
1. Switch to Model-Driven
2. Create Entity
3. Create App (Model-Driven) which can do a CRUD operation on the entity.
4. add a "Business Process Flow" with a few stage / Condition / "Data action"
what I can't do :
* I need to add "Action Step" and WorkFLow to the "Business Process Flow".
More specific:
1. Action Step: when I add an action step, I click on the new for "execute process" and I build something but it doesn't appear there.
2. WorkFlow: when I add WorkFlow, I click on the new for "Workflows" field and I build something but it doesn't appear there.