Update

[deejay]

===========================
Any ideas please?

Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.linuxliteos.com/forums/ and paste the log below into a new or existing thread for assistance.

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

Hit:1 https://dl.google.com/linux/chrome/deb stable InRelease
Get:2 https://packages.microsoft.com/repos/edge stable InRelease [7,343 B]
Hit:3 http://us.archive.ubuntu.com/ubuntu focal InRelease
Hit:4 http://archive.canonical.com/ubuntu focal InRelease
Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:6 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://repo.linuxliteos.com/linuxlite emerald InRelease
Hit:8 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease
Err:2 https://packages.microsoft.com/repos/edge stable InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
Reading package lists...
W: GPG error: https://packages.microsoft.com/repos/edge stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
E: The repository 'https://packages.microsoft.com/repos/edge stable InRelease' is not signed.