The ZeroError Lite version has less section than PRO version. When activated the free them from WordPress, it will display the latest post by default.
To set up the free theme
Go to Appearance -> Customize -> Static Front Page
and select a static page for front page displays, then all sections will appear there.
Please see the documentation to set up ZeroError Lite theme
The theme demo URL is the preview of ZeroError PRO version. It has all the section to create a professional and beautiful website.