Blood Tears ♡

When i teleport in some towns i get this error, any suggestions what can be the problem? General protection fault! History: UStruct::SerializeBin <- (Class Engine.ShadowBitmapMaterial ShadowActor[0]) <- UObject::Serialize <- (ShadowBitmapMaterial Transient.ShadowBitmapMaterial466) <- TestReach <- (ShadowBitmapMaterial Transient.ShadowBitmapMaterial466) <- UStruct::SerializeBin <- (Class Engine.ShadowProjector ShadowTexture[0]) <- UObject::Serialize <- (ShadowProjector 22_22.ShadowProjector773) <- AActor::Serialize <- TestReach <- (ShadowProjector 22_22.ShadowProjector773) <- ULevelBase::Serialize <- ULevel::Serialize <- TestReach <- (Level 22_22.myLevel) <- UStruct::SerializeBin <- (Class Engine.GameEngine GLevel[0]) <- UObject::Serialize <- (GameEngine Transient.GameEngine0) <- UGameEngine::Serialize <- (GameEngine Transient.GameEngine0) <- UGameEngine::Serialize <- (GameEngine Transient.GameEngine0) <- TestReach <- (GameEngine Transient.GameEngine0) <- TArray<< <- UGameEngine::L2SerializeRootSet <- UGameEngine::L2CollectGarbage <- UGameEngine::DetachLevel <- UGameEngine::CheckPurgeLevel <- Level_was_loaded <- UGameEngine::L2_Teleport <- UGameEngine::Tick <- UpdateWorld <- MainLoop