OctoPi Plugin says can only be used locally

I have the latest octopi installed and also installed the Astroprint plugin and authorised it with my free Astroprint account. I can see everything except the control function which says I must be on the local network to use this functionality? I thought once authorised and connected I was supposed to be able to remotely control the printer? Am I doing something wrong. the odd thing was that I was only local network when I got the error message, os a bit confused.

The current mobile app does not yet support the plugin on local networks. This is a priority for us which will be implemented right after we deliver the AstroBox Touch to our Kickstarter backers.