Webhook Has Not Been Setup Error

When the error "Mailchimp for Woocommerce has not added the webhook to Mailchimp" displays, it could be related to several situations with your hosting environment. Don't worry; data is still flowing from your store to Mailchimp. This error relates to a plugin feature that keeps customers' subscriber status in Mailchimp in sync with your store.

• First and foremost, ensure you have the latest plugin version and are running the minimum required versions of WordPress, WooCommerce, and PHP.
• Once that's completed, enable 'Remote diagnostics' from the 'Settings' tab of the plugin. Every few hours, we will attempt to reactivate the webhook remotely.
• If the error doesn't go away in a few days, your hosting provider or firewall might be blocking the "user-agent" header in the verification request to your site.
• You will need to ensure your server or firewall rules are set to allow the "user-agent" header with a value of "Mailchimp.com WebHook Validator."
• Lastly, validate that the REST API is working correctly. After logging in as an administrator, you can check this by appending /wp-json/mailchimp-for-woocommerce/v1 to your store's URL.
• If it fails, you must allow anything coming through /wp-json/mailchimp-for-woocommerce/* in your firewall.

If you're still unable to get the error to go away, create a new support ticket on GitHub.