Animation importing fail


When i try to import a animation made with blender, it shows me a window with some parameters, i don’t touch anything and it reads:
“Failed to import ‘C:\Users\slink\3D Objects\Animation humain blanc\Marche balco.fbx’. Failed to create asset ‘/Game/Personnage/Marche_balco’.
Please see Output Log for details.”
I tried to uncheck “Skeletal mesh” like i saw in others posts but it imports only the mesh.