Footer and main menu disappeared

I added TT marketpress plugin to my theme and when activated everything dissapears. I have multisite, marketpress and buddypress installed and using Mystile theme.

When I deactivate the plugin the Homepage re-appears however without the Header and footer. I have even tried going to each page and republished as well as going to Appearance>menus to check that seems fine. If I cant solved this I will have to upload the original files back to start all over again. :slight_frown: