I can't bake normal map .How to fix it ?

This is my unwarp uv. I don't understand why when importing the highpoly into substain , it can't read it and my highpoly is missing. 
I tried another way. By baking the normal map on zrush and it works, but when I bring it to maya it has a black error and doesn't appear. I also used normal exported from zrush to substance and it still displays normally. But when I put it back into maya the same error happened 
I'm a student, this is my assignment and I don't understand why it is like that. Hope everyone can help me, please!