The email is probably blocked by your email server. Please check your spam or junk mail first. If there isn't, please try to add our sender address: firstname.lastname@example.org and sending IP: 22.214.171.124 to the whitelist of your mailbox, especially when registering with business email address.
Or, you can also try with a different email, such as Gmail to register.
If these methods don't work, please send us the email address via email@example.com. We can help to check the status from our server end.