I have a similar problem.
If I start the engine without admin rights I just see “connect to Swarm” the whole time when I wanna build the lighting.
But in the Task Manager “not responding”. I can wait a hour and nothing will do anything.
And if I start the engine with admin rights the lighting will build, but the whole 3d models (just brushes converted to static meshs) are black after building the light.
I’ve attached the logs.
I’m using the unreal engine 4 that I compiled in Visual .