I found a fix in the comments for bug #183514, located here: https://bugs.launchpad.net/ubuntu/+source/seahorse/+bug/183514/comments/5
Basically, the fix is deleting the file /etc/X11/Xsession.d/90gpg-agent and restarting X (CTRL+ALT+Backspace).
Having this file there is a bug, especially for a fresh install.
I found a fix in the comments for bug #183514, located here: https:/ /bugs.launchpad .net/ubuntu/ +source/ seahorse/ +bug/183514/ comments/ 5
Basically, the fix is deleting the file /etc/X11/ Xsession. d/90gpg- agent and restarting X (CTRL+ALT+ Backspace) .
Having this file there is a bug, especially for a fresh install.