Hi @healthymamashouse,
Sorry for the issue. I think this could be one of three things.
First, tour IP address could be blocked by MailChimp. This is the most common reason for the error; MailChimp will block you (via a service called Akamai) if your IP address has been responsible for malicious things like spam. This happens the most in shared hosting environments where other websites share an IP address with you. It doesn’t mean that you were responsible for the malicious behavior but rather that someone else was using your current IP address and now it is compromised. To resolve this, get in touch with your server team and ask them to change you to a new IP address.
Second, there is another layer of cache on your site that needs to be cleared. Do you have any caching plugins that could be adding an additional layer of cache?
Lastly, there could be a problem with your server communicating with Mailchimp’s API.
One thing you could is to turn on debugging in our plugin, go to the lists page, and then see if anything was logged to the error log. Here are the instructions for turning on debugging: https://yikesplugins.com/support/knowledge-base/debug-settings/.
Hope that helps.
All the best,
Kevin.