Hi @goodnightrock,
This is feature is available on the premium version, if you are using the free version to create the popup then it does not work. If you are using the premium version of the user registration plugin. please go through this link https://wpeverest.com. You will find the live chat option to contact our support representative.
According to the WordPress Support community guidelines, we can not provide premium features support here because this support forum is for free plugin users.
Regards!