W: Failed to fetch https://downloads.plex.tv/repo/deb/dists/./public/Release.gpg The following signatures were invalid: BADSIG 97203C7B3ADCA79D Plex Inc

[mikerod]

This was fixed in one thread this morning, if you want to try again:

Invalid signature when trying to update packages [Debian] - Focal thread

Ok… Let’s take the sleigh for another ride. They’re talking about giving some serious love to the deployer. This is getting seriously old. For other threads abuout this topic, please make a post there which links to here, mark the post as “solution” and the forum will auto close.