Install Updates - unsupported version, windscribe and sur5r repo issues

[Toyo]

When I tried to install Linux lite updates a message showed up that says "Install Updates could not fetch the package cache information lists". Please help me in resolving the issue. Thanks. Below is the error log:

============ Log ===========

Err:1 https://repo.windscribe.com/ubuntu bionic InRelease
  Could not resolve 'repo.windscribe.com'
Hit:2 http://archive.canonical.com focal InRelease
Hit:3 https://brave-browser-apt-release.s3.brave.com stable InRelease
Hit:4 https://dl.google.com/linux/chrome/deb stable InRelease
Hit:5 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:6 https://repo.protonvpn.com/debian stable InRelease
Hit:8 http://archive.ubuntu.com/ubuntu focal-security InRelease
Hit:9 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:11 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:7 https://repo.linuxliteos.com/linuxlite emerald InRelease
Ign:10 https://debian.sur5r.net/i3 focal InRelease
Err:12 https://debian.sur5r.net/i3 focal Release
  404  Not Found [IP: 95.216.115.90 443]
Reading package lists...
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Translations (main/i18n/Translation-en_CA) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Translations (main/i18n/Translation-zh_CN) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
E: The repository 'http://debian.sur5r.net/i3 focal Release' no longer has a Release file.
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Translations (main/i18n/Translation-en_CA) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target Translations (main/i18n/Translation-zh_CN) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list.d/protonvpn-stable.list:4 and /etc/apt/sources.list.d/protonvpn-stable.sources:1