Outline/Overlay Material is black in Simulation Template

Hi,
I am struggling with an outline material I created following the tutorial https://www.youtube.com/watch?v=4-a8QZIf1Dc

Using this material as Overlay Material in the blank Games Template it works,

using it in the blank Simulation Template it is just a black, non-glowing outline

Can anyone tell what is wrong in using the Simulation Template?