Also, see Questions...
• Cannot add GPG key: General Error (https://answers.launchpad.net/cubic/+question/699574)
• How to install Cubic in Linux Mint 19.x ? (https://answers.launchpad.net/cubic/+question/699671)
Also, see Questions...
• Cannot add GPG key: General Error (https:/ /answers. launchpad. net/cubic/ +question/ 699574)
• How to install Cubic in Linux Mint 19.x ? (https:/ /answers. launchpad. net/cubic/ +question/ 699671)