I have filled out the necessary fields for account opening, but I had some difficulties in verifying that "I am not a robot". I got tired and I abandoned it.
Later, I tried again and I find this situation:
1) .- The field appears: "Username" empty (no name), and as soon as I enter my name, to the right of that field, a small red triangle appears and a message: "username is already in taken". But the little triangle continues in red and the word "username" also turns red
2) .- the other fields, (e.mail, address and password), are covered correctly.
3) .- Now comes "verify acount", but I am blocked by the username field, which continues with the warning in red.
4) .- I am not able to get out of this loop. What can I do to finish filling in this and open the account on GitHub?