Having trouble setting up ProtonVPN (NEW USER)

[red783]

Hey guys I had to reinstall my release of Ubuntu, and I'm having trouble getting ProtonVPN set up. I follow Protons online instructions but i get to a certain point in the command line and doesn't want to continue. I'll include what I see in my terminal.
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$ sudo add-apt-repository 'deb https://repo.protonvpn.com/debian unstable main'
Hit:1 http://us.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease
Ign:4 http://dl.google.com/linux/earth/deb stable InRelease
Hit:5 http://dl.google.com/linux/earth/deb stable Release
Hit:6 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:7 http://ppa.launchpad.net/flexiondotorg/minecraft/ubuntu focal InRelease
Get:8 http://repository.spotify.com stable InRelease [3,316 B]
Hit:9 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:10 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:11 http://archive.canonical.com/ubuntu focal InRelease
Hit:12 https://repo.protonvpn.com/debian unstable InRelease
Err:8 http://repository.spotify.com stable InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D1742AD60D811D58
Reading package lists... Done
W: GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D1742AD60D811D58
E: The repository 'http://repository.spotify.com 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: Skipping acquire of configured file 'main/source/Sources' as repository 'https://repo.protonvpn.com/debian unstable InRelease' does not seem to provide it (sources.list entry misspelt?)
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If anyone can help that would be awesome.

Thanks in advance,
red7800 ( I know it says 783. I gotta "post 10 times???" Anyway...)

[TheFu]

The 1st problem is with spotify. Remove that from your repo list however you added it. The output says you should look at the apt-secure manpage, section 8. Have you done that? If it was me, I'd just comment out the http://repository.spotify.com line in whatever sources.d file(s) it is. Then run sudo apt update && sudo apt full-upgrade .

When troubleshooting problems. Fix those that happen first, since they may also fix some later errors.

https://protonvpn.com/support/linux-vpn-setup/ appears to have out of date instructions, since resolvconf has been deprecated for systemd-resolved instead. Maybe contact support about that. Perhaps you are following different instructions? Please don't make us search and guess for things obvious to you.

These instructions https://www.fosslinux.com/45387/inst...nvpn-linux.htm from 2 months ago don't say that either.
I'm confused. Not that unusual.

Trying to use a debian unstable repo with Ubuntu is asking for APT problems. I did see a beta release from proton, however. Do you really want to have a paid VPN, but use a beta release of their packages and installer? https://protonvpn.com/support/official-linux-client/ are the instructions. It claims that 20.04 will work.
Which Ubuntu release do you have?
Did you follow the Ubuntu-specific steps?
Did you read the "Notes"?

I tried to visit https://repo.protonvpn.com/debian and it doesn't exist. In short, don't use those instructions.