I am trying to replicate the Vuforia example with the gear vr on this url : https://library.vuforia.com/articles/Solution/Integrating-Gear-VR-and-the-AR-VR-Sample-in-Unity-5-3-and-above
However I keep getting the black screen bug that was mentioned in the tutorial with the yellow reticle dot. I've went through almost all the forums but none of the solutions worked for me.
PS: The project works fine with the web cam on built in the laptop. I have signed the app for Mobile, and have put the sig file in the assets folder.