I've tried to use OVROverlay with Utilities 1.5 and 1.6 beta using Unity 5.6.2 and 2017.1 respectively to no avail. With both the sample framework scene and any scene I make with a single OVROverlay component in it crashes on startup when running on a Galaxy S7.
Sure no problem. Although I'm just building and running your overlay scene from the oculus framework with no modifications. Maybe it doesn't like some of my piblishing settings? I'll get you a logcat.