Can't attach?

[SchaSol]

I'm unable to get this to work. When I run the app, it throws an unhandled exception when it tries to do the SetItems().
It also appears to throw away the entire layout when I just do:
SetContentView(ResourceID);
_bottomBar = BottomBar.Attach(this, bundle);

The app doesn't crash, but it just shows a blank screen. When I remove the buttonbar line it shows the layout again...

The annoying part is that it's just giving me unhandled exceptions, and no traces of issues in any logs...