Mailchimp error

Good afternoon,

I have subscribed to your premium plan, and I have linked my Mailchimp account to a popup from your plugin by entering the API Key and the List ID. The problem is that when I try to register with different emails, the following error occurs:

email : Some Error Occured while sending the request!
mailchimp : {“type”:”https://mailchimp.com/developer/marketing/docs/errors/“,”title”:”Invalid Resource”,”status”:400,”detail”:”The resource submitted could not be validated. For field-specific details, see the ‘errors’ array.”,”instance”:”6f9dd4d3-46f5-c7bc-57eb-c7fbce73ec87″,”errors”:[{“field”:”email_address”,”message”:”This value should not be blank.”}]}