Main Menu navigation disappears after switching to Child Theme

Hi guys,

We recently switched to your Child Theme that came shipped with your wonderful Fortuna theme. After activating this though, it look like the main menu navigation has disappeared, and is not present in the HTML or console. Screenshot is here –> http://i.imgur.com/7nxXUYS.jpg

The current dev site (after we’ve switched back to the main theme) can be viewed through here –> http://dev.glideagency.com/wrays_rigwebsite/

Was there another step that needed to be made after activating the child theme? Even after making no edits to any of the child theme files, the main menu nav still disappears. If you require login details to check, I’m happy to provide.

Joel