Unable to install GNU Ring on Linux Mint 19 Cinnamon
https://ring.cx/en/download/gnu-linux
Ubuntu 18.04
$ sudo sh -c "echo 'deb https://dl.ring.cx/ring-nightly/ubuntu_18.04/ ring main' > /etc/apt/sources.list.d/ring-nightly-main.list"
$ sudo apt-key adv --keyserver pgp.mit.edu --recv-keys A295D773307D25A33AE72F2F64CD5FA175348F84
Executing: /tmp/apt-key-gpghome.K4lqTZZILJ/gpg.1.sh --keyserver pgp.mit.edu --recv-keys A295D773307D25A33AE72F2F64CD5FA175348F84
gpg: keyserver receive failed: No data
Please advise how to fix. Thank you