[antoniokenaz1]

Good afternoon,
I kindly request your support. I am configuring Mailchimp and have already set up the API key and pasted it, but I am receiving the following error: “Please, set up MailChimp API key and List ID.”

Could you please let me know what I might be doing wrong? The plugin I used is MC4WP: Mailchimp for WordPress. I would greatly appreciate your assistance in resolving this issue.

Best regards,

[serkan]

Hello, good afternoon,
Thank you for your message.
This error usually means that while the Mailchimp API key is entered correctly, the Audience (List) ID is either missing or not properly selected. In the MC4WP: Mailchimp for WordPress plugin, both are required.
Please double-check the following steps:
Make sure the API key is saved under MC4WP → Settings → Mailchimp.
In the same settings screen, ensure that an Audience (List) is selected and saved.
If no list appears, confirm that at least one Audience exists in your Mailchimp account.
After selecting the Audience, click Save Changes, then refresh the page and test again.
If the issue persists, it’s also worth clearing any cache and temporarily disabling other plugins to rule out a conflict.

Let us know if the problem continues after these checks, and we’ll be happy to guide you further.
Best regards,
Serkan