Problem with actor textur - Augmented Reality Android


For some time I started to create a project using AR technology on the android platform. Initially, I would like to upload the actor along with the animation of the person performing the exercise. Using the following tutorial, I was able to upload the actor with the animation. The character performs animations perfectly, unfortunately the textures are black. In viewport, the view is correct, but unfortunately in black on the phone.
Is there an option to enable colorful textures? Or maybe the instruction described in the tutorial applies only to “black” objects?

Link to the tutorial:
In the attachment I send a screenshot of the application’s operation.

I can also send blueprint screens.

Please help :wink: