Hi @HanziQ,

Sorry my bad, I do think the error is valid. And I need to read better, instead of trusting my browser.

I did not realise that it was asking for a username, instead of my login information which my browser auto filled in.

This can be closed. Thanks for the time.

@rorror Thanks, tried it and it works.
And I did not get the error.

Hi, Yesterday, I tried for the first a multiplayer game (after playing for +400 hours :) ), which works as expected. But someone, pointed me to my username,, which is my e-mail address. So I tried to change this on the website https://www.factorio.com/change-username after a valid login. But I get &...