Hi, you can check my answer here, it should fix your problems
You can check out the thread to get more information about it.
I also ran foreman-installer --foreman-proxy-content-enable-katello-agent=false to remove any traces of the Katello agent as I didn’t use it. You should do that as well if you don’t use the katello agent
@ivan Have you tried recreating the repository maybe ? Is your repository download_policy set to immediate ?