Iframe local file

I’m a newbie at using Ionic, was thrown at us by our professor to make HTML based app for android. I don’t really have any useful knowledge with AngularJs. I’m trying to insert an Iframe inbetween my tabs, the problem is that it can’t be found. I displays an error of webpage being down or removed.

I placed the src html file in the root of www folder with the index.html, but it can’t be found.

The reason I’m inserting an Iframe is because I’m using a JS based Visual Novel engine that displays itself on top of the page, even on other tabs. Another is that I need to use multiple kinds of those JS engine so I really need to use Iframe.