Hello, I am getting the following error. I do not know what could be the problem as there are some people signing up so I do not think it is the API.
Here is the error message I get in the email:
A free download user attempted to subscribe to your MailChimp newsletter list but had an error. See below.
No response came back. Please check your API Key is correct in the plugin settings.
Please let me know what I can do. Thank you.