Linux Lite 5.8 will not update - Brave No Pubkey

[Bob Tracey]

Tried it but got this:
===========================
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 http://archive.canonical.com/ubuntu focal InRelease
Hit:2 http://repo.linuxliteos.com/linuxlite emerald InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu focal InRelease
Hit:4 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:5 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease
Get:6 https://brave-browser-apt-release.s3.brave.com focal InRelease [2,820 B]
Hit:7 https://brave-browser-apt-release.s3.brave.com stable InRelease
Get:8 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Err:6 https://brave-browser-apt-release.s3.brave.com focal InRelease
  The following signatures were invalid: EXPKEYSIG 4FE13824E3FFC656 Brave Software <[email protected]>
Reading package lists...
W: GPG error: https://brave-browser-apt-release.s3.brave.com focal InRelease: The following signatures were invalid: EXPKEYSIG 4FE13824E3FFC656 Brave Software <[email protected]>
E: The repository 'https://brave-browser-apt-release.s3.brave.com focal InRelease' is not signed.