Anyone could help me for face tracking with rear camera to apply a 3d object?

Any way to anchor a 3d object to face in reality composer using the rear camera?

I am developing an app that stick a 3d object to the face. Right now i am using xcode and reality composer. The camera on arview that shows up is the rear, i need the front camera. I don’t know if is the right code for the reality composer file. Anyone could help me?

the error will go away after new 7 days?