Building Lighting stuck at 0%

Hello guys! I’m having a trouble. My Lighting Building is stuck at 0%.
But i’m in the middle of a project and i can’t ‘‘restart’’, it was normal until the last building lighting that in those ‘‘loadings’’ after reach 100%. then i just changed some textures and now i can’t rebuild lighting anymore.
It’s always stucked in ‘‘Skylight Radiosity’’

Already tried:
-Lowering the lightspecs
-Add Floor Template and rename to floor, Delete light mass and tried - Nothing
-Delete the folder “Save” and then he created another save, but still can’t build

  • Change specs of sun, sktlight, light source.
  • Lowered the resolution
    -Validate and Clear Swarm

All those things seems to solve to most people in older versions, i’ve read and tried everything i found about it.
My project is really big. Is an architecture VR project. It was taking about 2 hours to Build lighting.
my textures in all from good places, 4K.

My PC;
-Xeon x5690 3.46ghz 8cores - 12 threads.
RX 480 4GB
6GB Tri-Channel 2666mhz (It use max 2.8GB as it shows me in the Unreal)

As i said, i need to finish this in 4 days, and i have a lot of work on it, i can’t restart. Please help!

Sorry for my bad english, it ins’t my main language.

Thanks all!! Att.

Hello,

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Thanks