[LukeZarebsky]

Hello, I have a problem with update, also I can't install DEB packages..

Code:

=========================== Install Updates Error log =========================== Install Updates could not fetch the package cache information lists. Go to https://mityer.khdlhfjijfrupr.tk/forums/ and paste the log below into a new or existing thread for assistance. ============ Log =========== Hit:2 http://dl.google.com/linux/chrome/deb stable InRelease Hit:3 http://ppa.launchpad.net/audio-recorder/ppa/ubuntu focal InRelease Hit:4 http://ppa.launchpad.net/freetuxtv/freetuxtv/ubuntu focal InRelease Ign:5 http://ppa.launchpad.net/videolan/stable-daily/ubuntu focal InRelease Err:6 http://ppa.launchpad.net/videolan/stable-daily/ubuntu focal Release   404  Not Found [IP: 2620:2d:4000:1::81 80] Hit:7 http://archive.ubuntu.com/ubuntu focal InRelease Get:8 https://deb.opera.com/opera-stable stable InRelease [2 416 B] Hit:1 https://repo.linuxliteos.com/linuxlite emerald InRelease Hit:9 http://archive.canonical.com focal InRelease Hit:10 http://archive.ubuntu.com/ubuntu focal-security InRelease Hit:11 http://archive.ubuntu.com/ubuntu focal-updates InRelease Hit:12 http://archive.ubuntu.com/ubuntu focal-backports InRelease Err:8 https://deb.opera.com/opera-stable stable InRelease   The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 11EE8C00B693A745 Reading package lists... E: The repository 'http://ppa.launchpad.net/videolan/stable-daily/ubuntu focal Release' does not have a Release file. W: GPG error: https://deb.opera.com/opera-stable stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 11EE8C00B693A745 E: The repository 'https://deb.opera.com/opera-stable stable InRelease' is not signed.

[stevef]

Support for that version of software ended in April 2025.
Please consider upgrading to a supported version or at least stop connecting the system to the Internet.

It is possible that your update/upgrade symptoms are caused by the end of support.
With the deb issue it is not possible to comment as you have not provided any details.