IOS 9 breaks app - but no exception in console


The app I have on appstore breaks in IOS 9 GM, when I try to run the app in the emulator via Xcode 7 beta
The app opens, and show the first view but no data is visible. I can verify that the controller for the view is called.
I am already using https, and for safe measure I also followed a guide to enable the app to use http in IOS 9 - with no result.

But the main issue is that the sidebar menu don´t work anymore, I can´t navigate between the views, and with no output in the console that is a hard one to solve.

Any advice?