And again - navmesh trouble

So the problem is that ue4 removes nav meshes.
This is a very old problem, which I think everyone has already got it.

But this time ue4 removed not only nav-meshes, but also recast dummy. Therefore, nav meshes are now not generated at all. I’ve tried restarting the engine, deleting bound volumes and adding new ones, but no. When adding bound volumes recast dummy just not appearing, nav meshes not generating = \

How can i fix it?

p.s. Why do we need such a hardcore with simple nav mesh generation at all?
Why not do it like in the Creation kit - u have bound volume and generate button., so, when u push generate button - nav mesh generating in bound volume. Simple, fast and no pain =\