Unexpected password error when registering for a trial

When registering for a trial ( https://connect.nuxeo.com/register/#/ ), after the validation link, there is a phase where to choose a password;

• create a user toto.nuxeo@gmail.com where nuxeo is part of the mail
• choose as a password NuxeoOnline1$ where Nuxeo is part of the password
• this chokes with the attached screenshot1.png, which is unexpected because the choking condition is not listed as a requirement
• Choose another password and fall from the saucer into the frying pan: notice screenshot2.png => The registration is dead for this email.