Hello. I looked around all forums and tried many solutions - all in vain 
My first project in Unity for VR with cardboard. Can see objects when running game in Unity itself, but on mobile Instead of being able to look around the scene, I only get a solid blue colour in both the “windows”. Tried to run in development build mode and set Camera flag to skybox as well.
Any advice is appreciated.
Morning, Ghoshion. I solved my problem by trying to build and run on another, more modern phone. Worked without glitches.
I have resolved my issue for Google cardboard by these steps.
Edit -> Project settings -> Player -> Other settings -> Graphics APi
And remove Vulkan from the list by clicking - at the right bottom of the box.
@NatashaZ