Am so sorry - this is probably an easy fix where I've accidentally removed something, but I can't seem to figure out quite what is missing.
When clicking "Sign Up" the page which is supposed to show the registration form is just showing the header, button and footer - if you click the button, it says you haven't filled out the forms.
You can hopefully see it here:
fishwise.co.nz/index.php/cb-registration/registers
Thanks!