Obj model invisible in game

I download obj model. Paste file in to my project. Nice look in scene. Tested it in unity clicking on play. And I see the model. But, then I build game to android and trying test it on bluestakcs, in game this model become invisible, I suppose, this is called "rendering". I tried many thing like a changing shading, like changing build-options, like using another textures. Nothings work. May be, some coolest guy can help me and watch himself this model? Many other models are working! https://free3d.com/ru/3d-model/zeus-v1--499854.html