After further review we have decided to move this thread to a category we think is more appropriate for this topic, as it's related to troubleshooting on the PC Platform.
I think there's a time out limit for account login after getting booted. It might be as little as a few minutes and as much as 20-30mins. Maybe leave it for a bit and try again before any other troubleshooting to see if that fixes it for you.
Some people try logging onto the alternate server (na server if you're usually on eu or vice versa) to clear the login but I think that has a relog limit timing, too (no idea how long). Also, if you have no characters on the alternate server then it'll probably take longer since you'd need to create a test character to log into first.
I get the message that en error occured after a session crashed, often wehn travelling around, but also in the middle of fights.
An error occured, please wait some minutes and try again is wahat I have now.
So started a repair, the second rtepair today. ended the cleint after it, and restarted the client to launch teh game.
Game launched, login worked, a char is loading. handling crafing dailies. Next char, error 334, connection to lobby lost.
Ok, another char. working, need somewwww ressources, all ok here. next char, all ok. All ok looged through now, only daily crafing, and also the char with teh crash at the end loaded ok. SO no idea why it works sometimes, and soemtimes not.
Playing via Steam, win 11, Antivir Avast. Issue came up with the new launcher for me.
If the error was "An Unexpected Internal Error has occurred. Please contact customer service..." then please see this article for some more steps which may help. We also have this article with information on Error 307.