@khungate I have same issue! 🙁
I think Mailchimp is a really powerfull tool, but need more comprehension and more information about what to do in case A or B. I research in github and other websites but I can’t find a solution for my issue.
My issue is: “My Mailchimp Account doesn’t sync with my website”
Plugin version: 2.1.10
Hosting: Siteground
PHP version: 7.2
Login error: A lot! must common issue is –> We were unable to process the request. A product with the provided ID already exists in the account. on 1498 in /home/OOO/public_html/wp-content/plugins/mailchimp-for-woocommerce/includes/api/class-mailchimp-api.php
Caching Tool: Only Siteground SuperCacher
Reinstall: Yes, I did it many times.
Can I get support? I hope can use all mailchimp tools once solve this issue!
Thank you!.