Yesterday, I tried for the first a multiplayer game (after playing for +400 hours

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 "Invalid characters in username. Please use only alphanumeric characters and .- " while I have a valid e-mail address with only a-z0-9@. in it.
Second think I notice, and i think, i tried to change my username in the game. Is that on the website, it show my correct username [ wica ] but in the game it is still my e-mail address.
I hope my bug description is clear.