Security Entity Access page dissappeared

Hi all,

I am about to finish my App and wanted to check my Entity Access page. I went MyFirstModule -> Security and then I'm on a page with 4 tabs: Module Roles, Page Access, Microflow Access and OData Access, but the fifth one, the Entity Access page, is gone. 

Does anyone know how to create my Entity Access page again? I have no idea where it's gone and how it happened, but I think it has something to do with creating new Module- and Userroles. 

Thanks in advance, Lauran.