Mailchimp says: API Request Error – cURL error 28: Operation timed out

@magicsun Sorry to hear you’re having issues, we definitely want to try to help out.

Usually, when there are logs that reference things of this nature, it’s related to the server host preventing critical processes for the plugin to work correctly. As an initial troubleshooting attempt, you’ll want to reach out to them to ensure that they aren’t blocking admin-ajax.php in your WordPress install and the REST API is enabled.

Would you care to check on those two first and report back? I look forward to hearing back from you.

@khungate rest api is enabled.
Everything works, except it won’t sync.

When i visit [mysite]/wp-json/mailchimp-for-woocommerce/v1

I get:
{"namespace":"mailchimp-for-woocommerce\/v1","routes":{"\/mailchimp-for-woocommerce\/v1":{"namespace":"mailchimp-for-woocommerce\/v1","methods":["GET"],"endpoints":[{"methods":["GET"],"args":{"namespace":{"required":false,"default":"mailchimp-for-woocommerce\/v1"},"context":{"required":false,"default":"view"}}}],"_links":{"self":"https:\/\/www.vanrene.nl\/wp-json\/mailchimp-for-woocommerce\/v1"}},"\/mailchimp-for-woocommerce\/v1\/ping":{"namespace":"mailchimp-for-woocommerce\/v1","methods":["GET"],"endpoints":[{"methods":["GET"],"args":[]}],"_links":{"self":"https:\/\/www.vanrene.nl\/wp-json\/mailchimp-for-woocommerce\/v1\/ping"}},"\/mailchimp-for-woocommerce\/v1\/queue\/work":{"namespace":"mailchimp-for-woocommerce\/v1","methods":["GET"],"endpoints":[{"methods":["GET"],"args":[]}],"_links":{"self":"https:\/\/www.vanrene.nl\/wp-json\/mailchimp-for-woocommerce\/v1\/queue\/work"}},"\/mailchimp-for-woocommerce\/v1\/queue\/work\/force":{"namespace":"mailchimp-for-woocommerce\/v1","methods":["GET"],"endpoints":[{"methods":["GET"],"args":[]}],"_links":{"self":"https:\/\/www.vanrene.nl\/wp-json\/mailchimp-for-woocommerce\/v1\/queue\/work\/force"}},"\/mailchimp-for-woocommerce\/v1\/queue\/stats":{"namespace":"mailchimp-for-woocommerce\/v1","methods":["GET"],"endpoints":[{"methods":["GET"],"args":[]}],"_links":{"self":"https:\/\/www.vanrene.nl\/wp-json\/mailchimp-for-woocommerce\/v1\/queue\/stats"}},"\/mailchimp-for-woocommerce\/v1\/survey\/disconnect":{"namespace":"mailchimp-for-woocommerce\/v1","methods":["POST"],"endpoints":[{"methods":["POST"],"args":[]}],"_links":{"self":"https:\/\/www.vanrene.nl\/wp-json\/mailchimp-for-woocommerce\/v1\/survey\/disconnect"}}},"_links":{"up":[{"href":"https:\/\/www.vanrene.nl\/wp-json\/"}]}}

Which looks fine, no errors.

I’ve added this to my wp-config.php

define('ALTERNATE_WP_CRON' , true );
define('DISABLE_WP_HTTP_WORKER', true);
define('MAILCHIMP_USE_CURL', true);

This starts up the connecting process, makes the rest api error disappear. All the way up to last step: syncing. Then i get this error:

2019-09-19T19:12:34+00:00 NOTICE sync.started :: Starting Sync :: Thu, Sep 19, 2019 7:12 PM
2019-09-19T19:12:34+00:00 ERROR mailchimp_woocommerce_rest_api_get ::  :: 

@magicsun sorry for the delay – but you seem to have a configuration that would rely on having the WPCLI running in the background. Have you added the cron schedule as described in this wiki?

https://github.com/mailchimp/mc-woocommerce/wiki/Advanced-Queue-Setup-In-CLI-mode