PROBLEM & Help please

Hi All

I’ve been using Budgie for almost 2 years and am really enjoying it.
Here’s my problem;
as a non technical person this baffles me:
E: The repository ‘cdrom://Ubuntu-Budgie 20.04.1 LTS Focal Fossa - Release amd64 (20200731) focal Release’ does not have a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I’ve searched the forums for solution to no avail.
How do I resolve this?

Look for the app that is called “software updater” [I think] - or is available when run via a terminal command

software-properties-gtk

Untick the CD on your software sources

Thanks @fossfreedom
I don’t see CD on software sources. Here’s a screenshot.
Did I miss something?

I also got this error:

Think its on the “other software” tab

There is no CD option to tick.

It also says there’s no release file. Are there any more suggestions?

Please add a screenshot of your other software tab.

Also a screenshot after you have scrolled down on the Ubuntu Software tab - seems to be only a partial screenshot

Thanks for bearing with me

“Installation medium with Ubuntu 20.04 Focal Fossa” - that should be unticked

All those “disabled on upgrade” rows can also be deleted to clean up

So here is the latest setup.
Still giving me an error

second screenshot

Remember you need to help me to help you. What error?

In a terminal run:

sudo apt update
sudo apt full-upgrade

What is the output you see?

Of course, I will try be more helpful.
I have tried countless times to remove this protonvpn and element.

Of course, I will try be more helpful.
I have tried countless times to remove this protonvpn and element.

From the GUI, I get this:

W:Updating from such a repository can’t be done securely, and is therefore disabled by default., W:See apt-secure(8) manpage for repository creation and user configuration details., W:GPG error: https:// repo. protonvpn .com/debian stable InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 4EDE055B645F044F, E:The repository ‘https:// repo.protonvpn .com/debian stable InRelease’ is not signed., W:Updating from such a repository can’t be done securely, and is therefore disabled by default., W:See apt-secure(8) manpage for repository creation and user configuration details., W:GPG error: https: //packages .element .io/debian default Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY C2850B265AC085BD, E:The repository ‘https: //packages .riot .im/debian default Release’ is not signed.

From the Command Line I get this:
$ sudo apt update
[sudo] password for lgm:
Get:1 https: //repo. protonvpn .com/debian stable InRelease [2,519 B]
Err:1 https: //repo. protonvpn .com/debian stable InRelease
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 4EDE055B645F044F
Hit:2 http: //ubuntu. mirror .rain.co.za/ubuntu kinetic InRelease
Hit:3 http: //ubuntu .mirror .rain.co.za/ubuntu kinetic-updates InRelease
Ign:4 https: //repo. vivaldi .com/snapshot/deb stable InRelease
Hit:5 https: //repo. vivaldi .com/snapshot/deb stable Release
Hit:6 http: //ubuntu. mirror.rain .co.za/ubuntu kinetic-backports InRelease
Hit:8 http: //ppa. launchpad .net/graphics-drivers/ppa/ubuntu focal InRelease
Hit:9 https:// packages. element .io/debian default InRelease
Hit:11 http:// security. ubuntu .com/ubuntu kinetic-security InRelease
Get:10 https: //packages. element .io/debian default InRelease [3,609 B]
Ign:12 https: //ppa. launchpadcontent .net/flatpak/stable/ubuntu kinetic InRelease
Err:10 https: // packages.element .io/debian default InRelease
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY C2850B265AC085BD
Err:13 https: //ppa. launchpadcontent .net/flatpak/stable/ubuntu kinetic Release
404 Not Found [IP: 185.125.190.52 443]
Reading package lists… Done
W: GPG error: https ://repo.protonvpn .com/debian stable InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 4EDE055B645F044F
E: The repository ‘https ://repo.protonvpn .com/debian stable InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: https :// packages.element .io/debian default InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY C2850B265AC085BD
E: The repository ‘https ://packages.riot .im/debian default InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository ‘https:// ppa. launchpadcontent .net/flatpak/stable/ubuntu kinetic Release’ does not have a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

$ sudo apt full-upgrade
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
Calculating upgrade… Done
The following packages have been kept back:
gir1.2-nautilus-4.0 libnautilus-extension4 libnss-myhostname libnss-systemd libpam-systemd libsystemd-shared libsystemd0 libudev1 nautilus-data
systemd systemd-resolved systemd-sysv systemd-timesyncd udev
0 upgraded, 0 newly installed, 0 to remove and 14 not upgraded.

So the good news is that error has now gone.

What have you tried?

Where you are seeing:

You need to follow these instructions to resolve (alternate method)

Note:

https: //ppa. launchpadcontent .net/flatpak/stable/ubuntu kinetic

That repo can be safely removed from software-updater - the Other Software tab