This could be caused by the following:
1. You've mistyped your email address.
You may have mistyped your email address on the Login/Sign Up screen. Please re-enter your email address and tap "Send Link".
2. Your email address may not be accepting emails from humy.
If you've entered your email address correctly, please ensure that your email address can accept emails from the humy.me domain. The verification email may also be in your spam folder.