The Mainlog.txt shows that you can not connect to the archive server. Is your network connection configured properly, especially regarding IPv6?
"Impossible d'initialiser la connexion à fr.archive.ubuntu.com: 80 (2001:860:f70a::2). - connect (101: Le réseau n'est pas accessible)" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1806170 Title: impossible de passer a la version 16 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1806170/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
