Trying to Self host - Key error

I am using this tutorial to host Jitsi on a server. But I am getting an error after I download the key and try to do a gpg --search-keys command.

I am also fairly new to Ubuntu and any help would be appreciated. Thanks!

the video tutorial is 3 years old. In other words, it’s very outdated.

Try to follow the handbook instead and use the quick install,it’s about up-to-date.

The only restriction I have is that it says to use Prosody from distro with Ubuntu 20.04, it will work but only up to a point after which upgrading it through the Prosody PPA is recommended.

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