I was following this test case:
I don't know if it is my fault or not.
The server is a Samba AD
If I use "kinit" from the command line, it works.
Using gnome-online-accounts when I insert the Principal: user@DOM.AIN and I hit Connect the password spoke appears. I insert the password and hit OK.
The Principal spoke go gray saying Connecting...
After some seconds I get: Error connecting to enterprise identity server: Timeout was reached.
If I hit Try Again, the spoke says Connecting... but it never end. If I hit Cancel, it does nothing. The window is stuck. I can click with the right button of the mouse and close the window.
And Enterprise login is in place.
Furthermore. If I delete the kerberos account, I reboot and I retry the operation. And when "Timeout was reached." instead of "Try Again" I hit Cancel, the window doesn't close.