4.15.1 version problems

I installed 4.15.1 version and editor is frozen when I start building the lights.
My Standalonemode in swarm agent is True.
I wait 40 minutes at “0%” in preview quality and about 10 minutes to "100%.
Editor shut down when build is 93%…
No problem with older versions.
I don’t know what to do. The problem is the same in all projects.

64GB RAM, 2x 1080GTX, 8 core AMD # 5.6ghz per core …
I have pressed “build lighting” and waited 2 days or more before