Seems there's something wrong with the apt repo for libreoffice 6.3 Reading package lists... STDERR: W: The repository 'http://ppa.launchpad.net/libreoffice/libreoffice-6-3/ubuntu xenial Release' does not have a Release file. E: Failed to fetch http://ppa.launchpad.net/libreoffice/libreoffice-6-3/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. ---- End output of apt-get update ---- Ran apt-get update returned 100
As you can see, they do not package it for Xenial (16.04): http://ppa.launchpad.net/libreoffice/libreoffice-6-3/ubuntu/dists/ Only from Bionic onwards (18.04) Anyway, this is not TDF's problem. Closing.