Facebook SDK + Vuforia not working

HI, I’m using Vuforia AR to make my game, and I want to post a screenshot in Facebook, so I used Facebook SDK.

It’s all fine in unity editer in PC or Mac, but when I build in Android phone or IPhone, my vuforia is not working. AR camera is all black and could’n work.

I’ve search some solution but all of them is years ago, and not working in my project.
I’ve also tried Prime31 and NeatPlug socialnetwork plugins, still not working.

Please help, Thank you.

rebelincontrol :

I use latest Facebook SDK and check no scripts call camera texture in scene, I think it could fix it.