Sourcetree password window disappears immediately

[Holger Kirschbaum]

Hi,

I've been using Sourcetree for about a year without any problem. Since yesterday, I can't update my repo anymore due to a authentication error.

"Launch SSH Agent? Authentication via SSH keys failed, do you want to launch the SSH key agent (ssh-agent) and retry?"

When I click Yes, I get another popup and end in a loop where one popup calls the other and vice versa

"Click Retry When Ready. The SSH agent (ssh-agent) has been launched and is now running in the background. Please click "Retry" when ready."

I've notice before this happens, I can't enter my password anymore. Usually, I get a DOS looking cmd window when I start the tool and enter my password. The window still appears, but immediately closes after half a second. I already tried using a separate set of keys, but same issue (password window closing before I can enter anything and authentication popup loop).

Any advice? Thanks