Banner not visible after plugin publishing

The problem was :

I generated images with Illustrator, I got this before saving the image :

enter image description here

translation : “Some file names contains caracters no latin. These names won´t be incompativél with servers and Web browsers”

The problem was, I copied the name from a Web page and that created a non latin caracter.

When I named manually banners with the x key, The name files were different, look at this :
enter image description here