Registration form allows empty email

Hi,

I have set up a registration form that includes email field from “profiles fields”. It is shown as required to users, and when “send” is pressed, the field is shown in red, but the registration goes on and the user is registered without email.

You can check it here
https://afemefa.com/registro-usuarios/

Could you help me? Thanks

https://wordpress.org/plugins/wp-user-frontend/