Black normal map spots

New day, new test.

Today I made a material.
I tested it on two projects opened simultaneously.
On the left you can see the unreal 4 base project, with a directional light.
On the right you can see my project, directional plus skylight.
The directionals have the same settings.
The material is THE SAME.
Even the post process.

Why in my project I see the normals in this way and in the base project they seem ok?
I can’t solve this, I am just going crazy60d61e72911b01d3df954f0d73c2cbb5410ecd52.jpeg