Second mailchimp plugin

i installed a second mailchimp plugin called “WooCommerce MailChimp” and I said in the settings that every person who is ordering should be automatically entered into the list “”customer” without accepting and so logically no checkbox is on the checkout for this list . But the ordering people are not entered . Do you know why?

always i want to save the setting the error “Unable to load lists from MailChimp: () . Please check your Settings settings.” comes

please help me.