I had a similar issue, turns out the username I’d chosen was too long. After I shortened the name it went through.
Of course if your username was greg
that’s not it, but leaving this for anyone else who may find it.
edit: in hindsigh might have been a taken username.
Just joined today! Going to be fun to find new communities to interact with.
Thank you for making a Canadian instance. I became a citizen this month, and I couldn’t be happier about it.