Flameshot doesn't Work on Ubuntu 20.04

Solution 1:

Leonardo, try

flameshot gui

And also from docs, if want to define shortcut:

Open Settings → Devices → Keyboard → Shortcuts.

Search for 'print', and unbind the screen capture function by selecting it, and clicking backspace.

Scroll down and click on the '+'.

On 'Name', name it 'Flameshot' or 'PrintScreen'.

Define the command as 'flameshot gui'.

Select 'Define shortcut...'and click your keyboard Prt Sc key.

Solution 2:

Had the same issue on Ubuntu 21.04. I've installed snapcraft.io version from Software Center. The only solution I've found for now - install ubuntu-hirsute-universe version from Software Center or via terminal. It works good.