How do I make a working webview app using iframe?

Hello all!

I have a site/blog that I want to convert in an app. My idea was to make a menu layout with buttons that direct the user on a different page on the site.

I use iframe on another layout that goes to requested url. There is also a UI at the bottom with Back button, Forward button, Home button and Share button.

The whole idea should work, but when the browser layout loads, the iframe is blank (black).

I use a variable to identify the URL:

On tap Cat1>System Set PageVar to 1> Go to layout Main

System> PageVar=1>iframe: Go to "url x"

Thanks in advance!

C2 release 239 (64 bit), Windows 10 Home 64 bit, iframe plugin: HTML | iFrame v1.36

If anyone believes this should be in another forum, please say, I need an answer and I can't use any other tool to do my work.