Hey guys, I know is an old post, but maybe it can help.
I had the same problem, UE4 crashing when I tried to build lighting (version 4.16.0-3792635+++Odin+Release / because I’m working on a mod for Robo Recall).
So, I solved problem in a very simple way, just turning off the autosave. I realized that UE4 was crashing after the autosave was ending.