[Blender to UE4] bone transform problem

I am trying to do my own model with bones (rigged). I add bones and connect them to skeleton. If i import only skeleton to UE4, i can move bones and everything is good. But if I want to export any animations to it, in UE4 in animation object i don’t see any mesh - it’s empty. And, when i import it do UE4, i see a bug error like on screenshot. What should i do?

In blender rename the Armature, Unreal doesn’t like armatures named “Armature.”