Hello
when you have a message it is better to read it ! The information Orange is a Warning. Just hover the mouse on the little balloon/message
I also advise you to read the help of the component, you will better understand what its need and what it is doing.
Right click on middle of component
So here in the original script there was a 0.5 (normalized length) on the Length. It means the component was used to find the middle point of the curve.
It is not easy to duplicate this kind of script with just image as parameter can be hidden. But here the script was available.
You could also use Remesh by Color