SSTP. Установка и запуск в Ubuntu 20.04

Добавляем ключ и репозиторий

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 61FF9694161CE595
sudo nano /etc/apt/sources.list.d/sstp-client.list
  deb http://ppa.launchpad.net/eivnaes/network-manager-sstp/ubuntu eoan main 
  deb-src http://ppa.launchpad.net/eivnaes/network-manager-sstp/ubuntu eoan main 

Ставим пакет sstp-client

sudo apt install sstp-client

При установке могут возникать ошибки

The following packages have unmet dependencies:
 sstp-client : Depends: libevent-2.1-6 (>= 2.1.8-stable) but it is not installable