Emission power in one sketchUp file not working

I made a kitchen in SketchUp and the Emission power in the material editor is not working.
Also when I copy and paste the kitchen in a new SketchUp file it is not working to.
With all my other projects I never face this problem.
What I did wrong and how can I solve this

Have you tried exploding the group containing the material?
Also, please make sure the Layer 0 is visible

It did not work, but thanks for you reply

The problem presents itself only on that particular scene?