Change the image of custom layouts

[asanchez]

Hi, I have followed the tutorial to create new custom layouts in Bloomreach https://documentation.bloomreach.com/14/library/concepts/document-types/custom-editor-layout.html

I have a problem with the layout icon. The following images are displayed:

and I have these two defined:

Each one on its own route:
{project}\cms\src\main\resources\Complex

{project}\cms\src\main\resources\Simple

How does this treat the images? do you have to compile something else? I have added the following in the pom.xml of the cms:

[saimir.muco]

I remember to have a similar issue in the past and for me it was a browser cache issue. Can you check?