Sometimes there may be a delay in our mail server sending out the email with an activation link. In most cases, it's because of Greylisting set up on your mail server. In this case, email with an activation link will come in 15 minutes.
Also, please make sure to check your spam folder, it may be that your email server marked it as spam.
If you do not get the email with an activation link for a while, feel free to contact our support team and we will resend it to you.