Refresh failed for add-on repository in autoyast

Hi,

I have created a custom iso and i have “Refresh failed” for add-on repository using autoyast (opensuse leap 15.5 build 491.1). What is strange is that the repository is correctly handled on a laptop but not in a desktop. I really don’t understand how this can happen. Anyone having an idea of what is happening or a hint to narrow the search?