Abscence of textures on rendering to GearVR


I am new to UE and VR development, so forgive me if this is a noob question.
I created a 3 level first person blueprint project using UE4.9 and added a directional light, atmospheric fog and textures to each level (the first level is the default FirstPersonExampleMap).

The game renders and plays properly in my laptop viewport but when I package the project and run it on android, none of my sprites/textures are displayed. The objects come up in plain white/black. The lighting effect is also absent.

I am sure I am missing something trivial. Can someone please help me out?

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