NOTE: The problem with the repository has been resolved, so the change indicated here is not necessary. Anyway, if someone tries to do it, they will get an error message, as this file no longer exists.
Dear users: One of the RebornOS repositories is not working. For this reason, manual intervention is required to fix it. What you need to do is open the terminal, and run the following (use copy and paste to make things easier):
wget https://osdn.net/projects/rebornos/storage/repo/RebornOS/rebornos-mirrorlist-20211025-1-any.pkg.tar.zst
sudo pacman -U rebornos-mirrorlist-20211025-1-any.pkg.tar.zst
We apologize for the inconvenience. We will try to solve it as soon as possible. The other RebornOS repositories and mirrors work without problems.