In the Unity Editor or in the GearVR? The Unity Editor will naturally throw a "Virtual Reality SDK Oculus failed to initialize" unless you have a PC-VR headset connected to your PC. You need to build and run your project over to your phone. The "Failed to initialize" errors don't usually result in a refusal to run though. It should just default to standard monoscopic rendering - So I'm questioning whether I'v really understood what you meant.