CI 3 + HMVC form_validation library problem

I believe the problem is in your form. Can you post that? And ALL of your validation rules?

Unable to access an error message corresponding to your field name New Password.

That seems to indicate you have a field with the NAME 'New Password'.

There are no other validation rules and field name is 'password' ('New Password' is the mapped name for the view). Before the upgrade to CI 3 the form submission worked perfectly.