Hi Long, i still see this: Invalid form submission, please try again.
but, i have no validation on my form.
My shortcode is:
[mb_user_profile_register label_username="Usuario" role="subscriber" id="campos-usuario" label_submit="REGISTRARME" password_strength="false" confirmation="Su cuenta fue creada exitosamente! Haga click en el botón Ingreso" redirect="/registro-exitoso/" label_password="Clave" label_password2="Confirmar clave"]
do you need my user and password to access admin section?
If it is possible, please share the code that registered the field group with ID campos-usuario. Or share your site credentials by submitting a ticket on this contact form https://metabox.io/contact/.
There is no issue when I test to create a new user from the registration form on your site. So let's check this again and let me know if the issue still happens.