Because of the gb at the Beginning I would think you have a regional Server in the Settings? To control that click on the Settings Button. Then will open the Window Software & Updates. There You go to the first Tab on the Left:
Ah yes thanks a lot @Ponce-De-Leon. That solved the error. I had "custom server" in the dropdown. Is it better to use the main server rather than regional server?
Also, when I run
sudo apt update
I now get some warnings
4 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: Target Packages (restricted/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (restricted/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (restricted/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (restricted/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (restricted/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (restricted/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (restricted/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-small (restricted/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons (restricted/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-hidpi (restricted/dep11/icons-64x64@2.tar) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (restricted/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (restricted/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (multiverse/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (multiverse/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (multiverse/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (multiverse/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (multiverse/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (multiverse/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (multiverse/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-small (multiverse/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons (multiverse/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-hidpi (multiverse/dep11/icons-64x64@2.tar) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (multiverse/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (multiverse/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (restricted/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (restricted/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (restricted/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (restricted/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (restricted/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (restricted/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (restricted/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-small (restricted/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons (restricted/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-hidpi (restricted/dep11/icons-64x64@2.tar) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (restricted/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (restricted/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (multiverse/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (multiverse/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Packages (multiverse/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (multiverse/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target Translations (multiverse/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (multiverse/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11 (multiverse/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-small (multiverse/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons (multiverse/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target DEP-11-icons-hidpi (multiverse/dep11/icons-64x64@2.tar) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (multiverse/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
W: Target CNF (multiverse/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:26 and /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list:4
This will open an Overview. There You go to Line 4 and set a # at the Beginnig from the Line. After that you click on ctrl+o then Enter and then ctrl+x. With ctrl+o You save the Changes, with Enter You confirm it and with ctrl+x you close the Window. Then You can close the Terminal and try a sudo apt update && sudo apt upgrade again.