I have registered for Code Golf. I wanted to go to the meta, but write me that I have to enter. If you press Log in, you transfer me to the main page and nothing happens. If I click on Sign up and Confirm new account transfers to https://codegolf.meta.stackexchange.com/users/openidconfirm where it says Page not found
As said so in the comments, your profile on Code Golf is showing two accounts. We don't know why yet, but whatever caused that bug is most likely causing this bug here. Also, your other profile appears to have a Russian name there.
Perhaps the system is confused about which account you should set up for. Or, however, you could have created the new account when you tried to click "Sign up" on meta.