http://ppa.launchpad.net/qameta/allure/ubuntu focal Release does not have a Release file

when i execute command in ubuntu 20.04 - sudo apt-add-repository ppa:qameta/allure i received:

> Hit:1 http://ua.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://ua.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://ua.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:5 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal InRelease
Ign:6 http://ppa.launchpad.net/qameta/allure/ubuntu focal InRelease
Hit:7 https://dl.google.com/linux/chrome/deb stable InRelease
Err:8 http://ppa.launchpad.net/qameta/allure/ubuntu focal Release
404 Not Found [IP: 185.125.190.52 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/qameta/allure/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Start by reproducing the reported command, sudo apt-add-repository ppa:qameta/allure, on Ubuntu 20.04 and inspect the qameta/allure Launchpad repository configuration. There are no project files or tests mentioned; the issue is resolved when apt can find a valid focal Release file and update the package lists without the reported 404.

Written by the indexing model from the issue text.