Swarm Agent exporting scene forever

Hi! I’ve recently installed UE4 and I’m still learning to get the hang of it, the problem is that whenever i click on “Build lighting only” the editor freezes and i see Swarm Agent “Exporting to local cache” forever. I’ve been looking all over the net for 2 days now and haven’t found a solution.

I’d be very glad if you guys could help a newbie.

Forgot to mention my specs:
Core i7-7700HQ
16 gb RAM
GTX 1050
1tb hdd
128 ssd

Also i dont encounter this problem with the 4.11 version