For the Bootstrap theme, make sure you’re using the correct version of the theme that is compatible with your version of OJS 3. For example, when using OJS 3.0.2, you must be using Bootstrap theme version 1.0.1.
You can see the compatibility information here:
https://github.com/NateWr/bootstrap3/tree/ojs-3.0.2#version-compatibility
The journal summary is not designed to be shown anywhere on the default theme.