The icons in the help file ReadMe.chm point to a path that seems only to exist on your developing machine - see screenshot.
How to reproduce: Just install WWL as a different windows user.
The path in your screenshot is just an example. The path you see should be the path to the image on your computer.
Okay, I see. In a template, I have to use a suitable icon path on my machine. Thanks for clarifying.
exomoon