2013 Host Header Site Collection Site Content Add Apps Issue

I have a standard path based site as the default on my port 80 web app. I have then created a host header site collection on the web app. All seems to be working except the add an app feature. When I click add an app to try to add a basic SharePoint library , it just shows loading but doesn't go anywhere. Is there something I need to do specifically for a host header site collection to get this to work? It works from the default web. Any assistance greatly appreciated.