UrBackup install on Ubuntu 20.10 (groovy) gives "Unable to locate package urbackup-server"

I’ve got a Raspberry PI 4 with an external hard disk running Ubuntu 20.10 and I’m trying to setup UrBackup so I can back my other home PCs to it. However, I’m having problems installing it.

I added the repository but the “app-get update” didn’t like it so I had to add [trusted=yes]
I then tried to update and install UrBackup but it has problems finding an IP address. Any ideas would be appreciated? Please see the below console commands and results.

root@pi01:~# cat /etc/apt/sources.list.d/uroni-ubuntu-urbackup-groovy.list
deb [trusted=yes] http://ppa.launchpad.net/uroni/urbackup/ubuntu/ groovy main

root@pi01:~# apt-get update
There were other lines but as a new user to this forum it would not let me have multiple http lines.
E: Failed to fetch http://ppa.launchpad.net/uroni/urbackup/ubuntu/dists/groovy/main/binary-arm64/Packages 404 Not Found [IP: 91.189.95.85 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

root@pi01:~# apt-get install urbackup-server
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package urbackup-server

The ppa has ubuntu distributions that released after urbackup-server release missing. Use the OBS builds instead, please:

https://www.urbackup.org/download.html#server_redhat

Thanks for the quick reply.
I still get the same problem (I’ve had to replace “http” with “removed” since this forum limits me using the word):

root@pi01:~# echo ‘deb removed://download.opensuse.org/repositories/home:/uroni/xUbuntu_20.10/ /’ | sudo tee /etc/apt/sources.list.d/home:uroni.list
deb removed://download.opensuse.org/repositories/home:/uroni/xUbuntu_20.10/ /
root@pi01:~# curl -fsSL https://download.opensuse.org/repositories/home:uroni/xUbuntu_20.10/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_uroni.gpg > /dev/null
root@pi01:~# sudo apt update
Hit:1 removed://ports.ubuntu.com/ubuntu-ports groovy InRelease
Hit:2 removed://ports.ubuntu.com/ubuntu-ports groovy-updates InRelease
Hit:3 removed://ports.ubuntu.com/ubuntu-ports groovy-backports InRelease
Hit:4 removed://ports.ubuntu.com/ubuntu-ports groovy-security InRelease
Hit:5 removed://download.opensuse.org/repositories/home:/uroni/xUbuntu_20.10 InRelease
Reading package lists… Done
Building dependency tree
Reading state information… Done
All packages are up to date.
root@pi01:~# sudo apt install urbackup-server
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package urbackup-server
root@pi01:~#