Hi,
i have accessed to your website and the mailchimp option is disable. Can you enable it?
Or if you want, you can create a new user to me in your admin panel. In that way, I can modify the code on site. I have done this with other users and there were no problems. You can trust me. I only want to fix this problem. You can send me the information to my email admin@creabox.es
Regards