Crash After Building The Level Lights

Development Rendering
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Hello ,
The issue is Unreal Engine 5.5.4 crashes after light building process ( at encoding Texture after build Lighting phase )

Note : I can build different levels in the project. But I have got a level which has this issue.

The level has multiple streaming levels ( the other levels also have )

I use Sm5 , dx11 (no nanite, lumen, world partition features)

Here is the log sentence :
”….Error: appError called: Assertion failed: SubLevelData.SubLevelBrickPositions.Num() == SubLevelBrickAllocator[LevelGuid] [File:D:\build++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\Lightmass\ImportVolumetricLightmap.cpp] [Line: 1464]..”

For solution I tried ;
Removing landscape and try, removed directional and sky lights but any of them worked.

I hope there is a friend who has ideas or maybe a solution for this terrible issue .

Thank you

2

Whats the difference between these levels? Is this level using World Partition?

If you are using world partition, I had this same problem last week, but it turns out that the light builds are not fully compatible with WP. I got the build to work, but every time I reopened the project and tried to play I got the same error you have.

If you are not using WP, Have you made sure that the world settings is set to Force no precomputed light = false/disabled? Are the lights set to static?