[armbian bug on the PPA]

I am trying to install WireGuard on Armbian_19.11.3.346_Tinkerboard_bionic_legacy_4.4.199_desktop

according to the setup instructions site https://www.wireguard.com/install/

the following commands gave this output:

 

1

aws@tinkerboard:~/Desktop$ sudo add-apt-repository ppa:wireguard/wireguard  WireGuard is a novel VPN that runs inside the Linux Kernel. This is the Ubuntu packaging for WireGuard. More info may be found at its website, listed below. More info: https://www.wireguard.com/ Packages: wireguard wireguard-tools wireguard-dkms Install with: $ apt install wireguard For help, please contact <email address hidden>  More info: https://launchpad.net/~wireguard/+archive/ubuntu/wireguard Press [ENTER] to continue or Ctrl-c to cancel adding it. Ign:1 http://ppa.launchpad.net/wireguard/wireguard/ubuntu focal InRelease                                              Hit:2 http://ports.ubuntu.com bionic InRelease                                                                         Hit:4 http://ports.ubuntu.com bionic-security InRelease                                                                Err:5 http://ppa.launchpad.net/wireguard/wireguard/ubuntu focal Release                               404  Not Found [IP: 91.189.95.83 80] Hit:6 http://ports.ubuntu.com bionic-updates InRelease                   Hit:7 http://ports.ubuntu.com bionic-backports InRelease                                            Hit:3 https://apt.armbian.com bionic InRelease                                                      Reading package lists... Done E: The repository 'http://ppa.launchpad.net/wireguard/wireguard/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.

2

aws@tinkerboard:~/Desktop$ sudo apt-get install wireguard Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package wireguard

 

I tried to read and follow the posts on this thread https://forum.armbian.com/topic/4861-wireguard-on-armbian-tinkerboard/

however I could not get it installed.

would you please help ?