Unity iOS - OneSignal problem

Hi,

I started working on a project that was built using OneSignal v1.15.2.

On Android everything works fine. On iOS instead, I tried to follow this: https://documentation.onesignal.com/v3.0/docs/unity-sdk-setup (points [5.1 - 5.7]: they just add UserNotifications.framework)

Now, if I launch my application it crashes and the message is: "dyld: library not found". If I remove UserNotifications.framework the all game runs ok but notifications.

Is the current version of OneSignal so different from the past? Is there another setup process guide that I should follow?

I'm using Unity 5.3.1p4 and XCode 8.2.1 (I was using XCode 8.3.1 and notifications worked well, but this newer version have some documented incompatibility with Unity 5.3.1p4).

Can anyone help me?

Thank you.

Best regard, Andrea.