DFAO - Mesh Distance Fields Is Not Working

hello guys!
I have a problem with the DFAO, I checked it in the project settings and restarted the project, added a skylight as movable and the engine scalability settings is set to epic …
and when i check the mesh distance fields under show - visualize it doesn’t work and shows nothing, just brightness the screen a bit
here is a screen of the problem, and the project files

I tried it on 4.16 and 4.17 and no difference