Ok I did that and it works now, thanks !
If the domain does not exist anymore, the image shouldn’t appear anymore in the theme then :)
Thanks for your help !

Thanks for your reply but there is any image uploaded on this section !
The only images I added are mine so I don’t understand.
Because if even I uploaded the demo contents, any images have been uploaded, only texts and colors of the demo.

So I guess I have to modify the code with the FTP ? If yes, where I can do this ?

Thanks