I did a copy and paste and it didnt work on a sprite I am working on.
I tried adjusting the thickness param as suggested (up to 2000) and I saw no change.
I did notice something when I was pasting over though.
There is a Multiply Node that is not connected.
Is it supposed to be left disconnected?
Aside from that, are there any other set up which I need to pay attention to? (e.g. Blend Mode)