Make sure that in the project security, you have security set to “Production” and not “Prototype / Demo”. When it's set to the latter, there is no entity access tab. This is the last step in 9.3.2, that you might have missed:
By the way, when you ask a question about learning paths, it would help greatly if you let us know which step you are on (in this case, 9.3.3). It makes it much easier to answer the question :-)
please change the Security Level in the App Security ( Go to the App explorer, expand the project and double click on Security).