Cannot see imported mesh in preview

Press “F” so that if the size of the object is too small to find in Viewport, it will zoom and focus at the object selected

Cannot see imported mesh in preview
I create meshes in blender from standard cube mesh, and then importing it, as fbx file, in 3DMax, and from 3DMax importing in UE4 as Datasmith (Datasmith from blender is not working well…)
So in UE4 MainView everything is looks ok, but in preview, and mesh window its not showing everything (on foto)… i can apply materials, but i cannot nothing to do with collusion, cuz there is no mesh in mesh window(
Please, how i can solve this problem?

No, its still the same((