Как установить Xtreme Download Manager (XDM) в ubuntu 18.04?

Чтобы установить диспетчер загрузок Xtreme, я использовал следующие команды, основанные на том, что здесь .

sudo add-apt-repository ppa:noobslab/apps
sudo apt-get update
sudo apt-get install xdman  

Но вот что я получаю от терминала и не могу его установить:

sepideh@sepideh-Lenovo-ideapad-700-15ISK:~$ sudo add-apt-repository ppa:noobslab/apps
[sudo] password for sepideh: 
 This PPA Contains Applications for Ubuntu/Linux Mint from different sources but debianized by http://www.NoobsLab.com
 More info: https://launchpad.net/~noobslab/+archive/ubuntu/apps
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Ign:3 http://ppa.launchpad.net/noobslab/apps/ubuntu bionic InRelease
Hit:4 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit:5 http://dl.google.com/linux/chrome/deb stable Release
Get:7 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Err:8 http://ppa.launchpad.net/noobslab/apps/ubuntu bionic Release
  404  Not Found [IP: 91.189.95.83 80]
Get:9 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:10 https://repo.windscribe.com/ubuntu zesty InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/noobslab/apps/ubuntu bionic 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.
sepideh@sepideh-Lenovo-ideapad-700-15ISK:~$ sudo apt-get update
Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://dl.google.com/linux/chrome/deb stable Release
Get:4 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Hit:5 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Ign:6 http://ppa.launchpad.net/noobslab/apps/ubuntu bionic InRelease
Get:7 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Err:8 http://ppa.launchpad.net/noobslab/apps/ubuntu bionic Release
  404  Not Found [IP: 91.189.95.83 80]
Get:9 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:10 https://repo.windscribe.com/ubuntu zesty InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/noobslab/apps/ubuntu bionic 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.
sepideh@sepideh-Lenovo-ideapad-700-15ISK:~$ sudo apt-get install xdman
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package xdman
sepideh@sepideh-Lenovo-ideapad-700-15ISK:~$ 

Что мне делать?