我正在尝试安装 Kubuntu 21.04，但我收到了以前从未发生过的错误：
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
我试图禁用所有 PPA，但没有成功。
这是/var/log/dist-upgrade/main.log输出：
2021-06-06 12:03:13,081 INFO Using config files '['./DistUpgrade.cfg', '/etc/update-manager/release-upgrades.d/ubuntu-advantage-upgrades.cfg']'
2021-06-06 12:03:13,082 INFO uname information: 'Linux Ideapad 5.8.0-55-generic #62-Ubuntu SMP Tue Jun 1 08:21:18 UTC 2021 x86_64'
2021-06-06 12:03:13,638 INFO apt version: '2.1.10ubuntu0.3'
2021-06-06 12:03:13,638 INFO python version: '3.8.6 (default, May 27 2021, 13:28:02)
[GCC 10.2.0]'
2021-06-06 12:03:13,643 INFO release-upgrader version '21.04.12' started
2021-06-06 12:03:13,655 INFO locale: 'fr_FR' …