Custom template icon not showen correctly

I’ve got these buildings here wich dont have the image shown on the custom list as u can see in the next image. Does anyone know how to fix it?

Did you manually renamed the files? That’s one cause.
If you did, you need to also open the .json and rename it inside. There is one field where the .png file name is listed.


That worked. seems you have to change the name twice.