Hi @zollo, When the error “Mailchimp for Woocommerce has not added the webhook to Mailchimp” displays, it could be related to a couple different situations with your hosting environment.
– Sometimes a connection between your store and Mailchimp has gone awry. As the first step in troubleshooting, please enable ‘Remote diagnostics’ from the ‘Settings’ tab of the plugin and provide us with your URL. From there, we will attempt to restore the connection.
– If the first troubleshooting method proves unsuccessful, 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 not blocking this “user-agent” header with a value of “MailChimp.com WebHook Validator.”
– If the previous two attempts to fix fail, the REST API may be failing. You can check this by appending /wp-json/mailchimp-for-woocommerce/v1 to your store’s URL after logging in as an administrator. If it is failing, you must allow anything coming through /wp-json/mailchimp-for-woocommerce/*.
As a first step, reply back with your store URL and enable remote diagnostics in the plugin by going to the Settings tab -> and checking the Remote Diagnostics box and we’ll take a look. If that doesn’t work, we’ll want to investigate further with your hosting provider as noted.
We look forward to hearing back from you.
