Having trouble to import fbx

Hello,

I’m having trouble to import a fbx mesh from Blender to UE4.
This is a very simple mesh, and that’s why I can’t understand where the problem is.
Maybe the problem is within Blender, but I’m not really sure, here are screenshots of the mesh from two different angles:


Could someone tell me if the problem is solvable within UE4?

looks like the Normals are reversed.