我已经重启了系统sudo apt 更新和sudo apt 升级然后再次重新启动，但此错误消息并未消失。实际上，我想安装 WiFi 驱动程序，并且我已经成功安装，但此错误消息仍然存在。如果有人知道如何解决这个问题，我请求他们发布一种方法。非常感谢！！（Ubuntu 20.04 LTS）
sudo apt update 的输出是：
[sudo] password for chess:
Get:1 https://deb.opera.com/opera-developer stable InRelease [2,591 B]
Hit:2 https://dl.winehq.org/wine-builds/ubuntu bionic InRelease
Hit:3 http://uk-mirrors.evowise.com/ubuntu focal InRelease
Hit:4 http://download.virtualbox.org/virtualbox/debian focal InRelease
Hit:5 https://download.mono-project.com/repo/ubuntu stable-bionic InRelease
Get:6 https://deb.opera.com/opera-developer stable/non-free amd64 Packages [1,796 B]
Hit:7 http://uk-mirrors.evowise.com/ubuntu focal-updates InRelease
Hit:8 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:9 http://uk-mirrors.evowise.com/ubuntu focal-security InRelease
Get:10 http://security.ubuntu.com/ubuntu focal-security InRelease [109 kB]
Hit:11 http://ppa.launchpad.net/alexlarsson/flatpak/ubuntu focal InRelease
Hit:12 http://archive.canonical.com/ubuntu focal InRelease
Hit:13 https://packages.microsoft.com/ubuntu/20.04/prod focal InRelease
Hit:14 http://uk-mirrors.evowise.com/ubuntu focal-backports InRelease
Hit:15 http://deb.playonlinux.com precise InRelease
Hit:16 http://ppa.launchpad.net/apandada1/foliate/ubuntu focal InRelease
Hit:17 https://download.sublimetext.com apt/stable/ InRelease
Hit:18 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal InRelease
Hit:19 http://ppa.launchpad.net/gerardpuig/ppa/ubuntu focal InRelease
Hit:20 http://ppa.launchpad.net/inkscape.dev/stable/ubuntu focal InRelease
Hit:21 http://ppa.launchpad.net/kelebek333/kablosuz/ubuntu focal InRelease
Hit:22 http://ppa.launchpad.net/kritalime/ppa/ubuntu focal InRelease
Hit:23 http://ppa.launchpad.net/linrunner/tlp/ubuntu focal InRelease
Hit:24 http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal InRelease
Hit:25 http://ppa.launchpad.net/mozillateam/firefox-next/ubuntu focal InRelease
Hit:26 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu focal InRelease
Hit:27 http://ppa.launchpad.net/openshot.developers/ppa/ubuntu focal InRelease
Hit:28 http://ppa.launchpad.net/peterlevi/ppa/ubuntu focal InRelease
Hit:29 http://ppa.launchpad.net/rvm/smplayer/ubuntu focal InRelease
Hit:30 http://ppa.launchpad.net/teejee2008/ppa/ubuntu focal InRelease
Hit:31 http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu focal InRelease
Hit:32 http://ppa.launchpad.net/xuzhen666/gnome-mpv/ubuntu focal InRelease
Fetched 114 kB in 11s (10.2 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.