I downloaded Lilypond version 2.21.2 today. When I ran the script with the --doc option, Lilypond installs but the docs can't be downloaded.
I also tried with version 2.20.1, with the same result. I get the following output: No ./Downloads/lilypond-2.21.2-1.documentation.tar.bz2 found, downloading. --2020-07-10 17:15:04-- http://lilypond.org/downloads/binaries/documentation/Downloads/lilypond-2.21.2-1.documentation.tar.bz2 Resolving lilypond.org (lilypond.org)... 35.206.114.173 Connecting to lilypond.org (lilypond.org)|35.206.114.173|:80... connected. HTTP request sent, awaiting response... 404 Not Found 2020-07-10 17:15:04 ERROR 404: Not Found. Is this a temporary problem with the server, or is there something else I should know or do? David