I see that the message that you were working on the login problem has been taken down on the website. When open the launcher program and enter my username/password, I still get an error "There was an error completing your request. Please try again." I have verified and typed slowly both the username and password correctly.
I just tried a different account on the game and I still get the login error. Looks like there is still a problem or the fix is taking a while.
I was having the issue too. It just fixed itself. Edit: I just saw this... Mepps addressed it here https://forums.daybreakgames.com/dcuo/index.php?threads/daybreak-maintenance-may-28-2019.302347/
After a few hours of the game working, now when I logon I get to the 'Wonderwoman' picture and then the game exits with the message 'There was an authentication issue connecting to the world. Please tray again. <0x0018>'
Yep, login is borked for the moment. Just in time, I was getting hungry. Gonna go out and eat, and if DCUO is still down after that, its time to call it a day.
I was able to get in a few hours ago, but now I'm just getting dumped when the character list tries to load. Authentication error again. I was going to play tonight, so I guess I'll go to my alternate game again.
Just for troubleshooting, I tried restarting my PC, then tried again. Still the same issue. I get to the picture of Alan Scott, Wonder Woman, and Jay Garrick, and then I get the crash screen with the same error message. So its definitely an internal server issue. And this was on the US Server. As for the multiple account comment I said a few minutes ago, I have this membership account and a free to play account. And neither of them are working. I guess I will just try again in the morning. Hopefully it will all work out by then.
My guess as to what happened? The maintenance team was doing server patching, or maybe it was automated. After the patching was complete, some server settings get defaulted, and hence server error occurs. That or
Going on an hour now. I was in on both PC and PS4, running Seasonal outdoor and Chaos Gotham, then when I went to switch toons, can't get back in on either account. And this is BEFORE the downtime tomorrow and in the last 3 days of the seasonal. Never sure why they can't hold off maintenance until the seasonals are over...apparently they can't. Reinheld