Hi
I failed to upgrade on time and now must to upgrade via 20.04 release.
I replaced source.list with old-releases.
do-release-upgrade -c shows "20.04.5 LTS"
then during upgrade, a lot of errors like:
Error: http://archive.ubuntu.com/ubuntu focal-updates/main amd64 pulseaudio amd64 1:13.99.1-1ubuntu3.13
.... /var/cache/apt/archives/partial/pulseaudio_1%3a13.99.1-1ubuntu3.13_amd64.deb - open (13: No access) [IP: 153.19.251.225 80]
Is there any trick to upgrade it?