When I want to upgrade Ubuntu from 18.04 Bionic Beaver to 18.10 to Cosmic Cuttlefish via terminal with
sudo do-release-upgrade -d command it gives me warning:
Failed to connect to https://changelogs.ubuntu.com/meta-release-development. Check your Internet connection or proxy settings.
However I have internet connection, I write this question now from my Ubuntu computer.
How can I resolve this?