Hi @anawalmart ,
Thanks for your message.
Sorry to hear you couldn’t get the plugin working for you. When I checked Optin Cat on my own site with Mailchimp, it works for me.
We have this guide here for troubleshooting Optin Cat issues – https://fatcatapps.com/knowledge-base/test-email-integrations/
I would recommend trouble shooting the above issues and checking to see if that solves the issue.
You can also try sending us a link to your optin form and we can try trouble shooting from our side.
Feel free to reach out to us again if you have any issues.
All the best.