Yes then that would be a migration problem. I will make a new account with . In it. And if it is necessary I will remove the dot from his name.
The dot is sadly not an issue 
I will try the space…
Yes it’s a space. That’s the issue. Ok, will change it so his profile is viewable again. Well… I can’t change it. But I have questioned the user with the issue, to change it himself.
Thanks for the support! I will come back with any more questions!