When I try to build light, not only it takes a lot of time, but after 1 hour or so, this crash happens:
LoginId:94aae8ff4ea9282bee41fdbffe1e6b45EpicAccountId:0828e3a9848a48538d76d5792d27c235Assertion failed: Texture->AddElement(PendingGroup) [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/LightMap.cpp] [Line: 2457]UE4Editor_CoreUE4Editor_CoreUE4Editor_EngineUE4Editor_UnrealEdUE4Editor_UnrealEdUE4Editor_UnrealEdUE4Editor_UnrealEdUE4Editor_UnrealEdUE4Editor_UnrealEdUE4EditorUE4EditorUE4EditorUE4EditorUE4Editorkernel32ntdll