Sudo add-apt-repository ppa:lutris-team/lutris does not work on my ubuntu

I am trying to sudo add apt the ppa of lutris and the terminal isn’t finding the archives:

Err:8 http://es.archive.ubuntu.com/ubuntu disco Release
404 Not Found [IP: 91.189.88.142 80]
Etc…(sorry lutris forums does not let me put more than one link)

And then:

E: The repository “http://archive.ubuntu.com/ubuntu disk Release” no longer has a release file.
N: You cannot update from a repository like this safely and therefore it is disabled by default.
N: See the apt-secure (8) man page for details on creating repositories and configuring users.
Etc…(sorry lutris forums does not let me put more than one link)

Does someone have the same problem as me?
Any help would be appreciated,
Thanks.