SOLVED: Multiple cursors not working on Linux Mint (_not_ an Obsidian bug after all)

Alt plus click does not activate multiple cursors

(Linux Mint 19.2 “Tina” - Cinnamon desktop)

Turns out the issue was a Cinnamon default binding for - combinations. Instructions to fix found at the following link:

Is there any fix for Ubuntu 18.04 multiple cursor used to work not anymore ?