Stacklit. Make sure LTC area lights are setup correctly if no other material has set them up.

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLit.cs

         public override void Build(HDRenderPipelineAsset hdAsset)
         {
             PreIntegratedFGD.instance.Build(PreIntegratedFGD.FGDIndex.FGD_GGXAndDisneyDiffuse);
-            //LTCAreaLight.instance.Build();
+            LTCAreaLight.instance.Build();
 
             m_isInit = false;
         }
             PreIntegratedFGD.instance.Cleanup(PreIntegratedFGD.FGDIndex.FGD_GGXAndDisneyDiffuse);
-            //LTCAreaLight.instance.Cleanup();
+            LTCAreaLight.instance.Cleanup();
 
             m_isInit = false;
         }
         public override void Bind()
         {
             PreIntegratedFGD.instance.Bind(PreIntegratedFGD.FGDIndex.FGD_GGXAndDisneyDiffuse);
-            //LTCAreaLight.instance.Bind();
+            LTCAreaLight.instance.Bind();
         }
     }
 }