I use to get that message, go to system, add-ons, then get add-ons and scroll to the Xfinity repo and uninstall it.
Have you tried installing from zip the Zeus repo, its in Install from zip file. As for Primewire I'm not sure why its not working for, when you put the domain in did you click ok at the bottom as this saves the changes. If you don't it just goes back to the last one again.
As for Zeus also check its in the file manager in the list of repos. If not you will need to add the source....good luck
Have you tried installing from zip the Zeus repo, its in Install from zip file. As for Primewire I'm not sure why its not working for, when you put the domain in did you click ok at the bottom as this saves the changes. If you don't it just goes back to the last one again.
As for Zeus also check its in the file manager in the list of repos. If not you will need to add the source....good luck