1. Either have a user that does not have a specific role or create a new user.
2. Navigate to Control Panel -> Users -> Roles
3. Select a role (e.g. Portal Content Reviewer). Navigate to Assignees.
4. Assign your role to your user.
5. Hover over the back button.
Back button works, navigating you back to the Roles menu.
Back button does not work. It does not have a link attached to it.