Some automatically generated emails end up in the SPAM/JUNK folder at various mail providers. Please check there if you can find the registration email. Since e-mail providers also work with so-called "blacklists" and do not display certain e-mails at all and also do not move them to the SPAM/JUNK folder, it may be that the registration e-mail does not reach you or reaches you with a time delay. Otherwise, please try to press "Resend registration email" in the menu item "My profile" at the very bottom and make sure that the email address has been entered correctly. If the above points do not help, please use an alternative email address when registering.