Debian officially released Buster as the stable OS. Some Repos are offline and may show as such in Makulu Distro’s. Don’t freak out, Debian is making changes and when they are done, Makulu will send an Update that automatically adapts the Repository settings to what they should be, just be patient. There is nothing you as a user need to do your side except relax and wait for our update. shouldn’t take more than few days at most.