The "Login Error: Error 301" occurs when The Elder Scrolls Online: Tamriel Unlimited game client was not able to connect to the server correctly.

PC/Mac players can find some troubleshooting steps on our official forum here: http://forums.elderscrollsonline.com/discussion/61678/login-error-codes-their-meaning-and-solutions. If the error still occurs after following the listed steps, players can follow our ESO Help YouTube video, http://youtu.be/3fNqpZE_4rs to create a Game Consultant log file and upon request, send it to our dedicated Customer Support Team at https://help.elderscrollsonline.com/app/ask.

Console players may also receive this error message when the game client is not able to connect to the server correctly. Due to a high login volume on the consoles megaservers, we recommend players to try logging into the game again. We are continuing to investigate the issue some players are encountering when they attempt to log in to ESOTU on PlayStation 4 and Xbox One, more information about connectivity troubleshooting can be found here:

Xbox One: http://support.xbox.com/en-US/xbox-one/networking/network-settings
PlayStation 4: https://support.us.playstation.com/app/answers/detail/a_id/5399