Взаимопомощь GNU / Linux

If this happens to you run the installer in the terminal or look in the installer log where it writes the URL it is downloading.

Download the file by hand in your browser/downloader/whatever and put it in the ryzom folder.

Re-run installer.

If you do not know where your ryzom folder is look in ~/.local/share/Ryzom/ryzom_installer.ini - the installation_directory is where the installer log and the downloads go.