Edit: Resetting the password as if I had forgotten it solved the issue.
Hi,
I started getting that message when trying to log into the launcher this weekend but retrying always worked. Today retrying never works. Everything was fine before and I didn’t change anything. Tried everything on the launcher troubleshooting wiki page and AnswerHubpostssimilar to this one.
The only thing that’s worked so far is to go offline, start Unreal Tournament and log in from the game’s main menu but that doesn’t help with the launcher.
My computer has a global IP address and is not behind any other firewall than the Windows one and the ISP’s blocking of things like the email port.
The error message changed to saying too many sessions have been issued to my account. Someone fixed that one by resetting their password which worked for me too.