Android deployment crashes at launch

I’m starting to learn how to create games on android devices.
And for my first try, I did something really simple :

An empty map, a single line trace to activate things by moving the device and that’s it.

But when I’m packaging and deploying the game on my smartphone the game crashes right at launch.
I have absolutely no idea why, I followed the documentation on Android diployements and Gear VR (long term goal) and I’m stuck.

What details do I need to give you to be more specific ?

Thank you

I heard on other threads that sometimes the device’s OS doesn’t support certain math functions. Can you get to the debug logs that run when you launch a single level to the device? They might hold some clues.