Title: List not set Error- API key not validating
Last modified: July 17, 2018

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# List not set Error- API key not validating

 *  Resolved [shchandr](https://wordpress.org/support/users/shchandr/)
 * (@shchandr)
 * [7 years, 10 months ago](https://wordpress.org/support/topic/list-not-set-error-api-key-not-validating/)
 * Hi,
 * The mailchimp API key is not validating. It shows a red cross.
 * I have tried all these steps:
    1. First please deactivate all plugins except 
   Optin Cat and see if the issue persists. 2. If the issue is resolved, reactivate
   your plugins one by one to see if the issue returns. 3. If no conflict is found
   among your plugins, try reverting to a default WP theme like ‘Twenty Sixteen’,
   or ‘Twenty Seventeen’, and see if the issue is resolved.
 * It is still not resolved. No other problem with Mailchimp integration or with
   hosting provider.
 * A lot of users have reported this issue here and it doesn’t seem to have been
   resolved.
 * Is there anything that can be done from your end?
 * If not, then I’m guessing the only option I have is to look for another plugin
   to replace optin cat.
 * Thanks

Viewing 1 replies (of 1 total)

 *  Plugin Author [fatcatapps](https://wordpress.org/support/users/fatcatapps/)
 * (@fatcatapps)
 * [7 years, 10 months ago](https://wordpress.org/support/topic/list-not-set-error-api-key-not-validating/#post-10565839)
 * Hello Schnader,
 * Sometimes plugins have a bit of trouble connecting through API, especially if
   your key is older.
 * So the next thing to try is getting new API key through MailChimp. Try to connect
   using the new API, and see if that makes a difference. (Bear in mind you will
   need to update your API key with anything else you have provided it too.)
 * If that does not help there could also be something up with your hosting, which
   is preventing communication with MailChimp. To test for this, simply find another
   plugin that requires a MailChimp API key. If it is still not accepted, and we
   have confirmed there is not a conflict, then you would want to contact your host
   for a resolution.
 * Let me know if that helps, or if we can do anything else.

Viewing 1 replies (of 1 total)

The topic ‘List not set Error- API key not validating’ is closed to new replies.

 * ![](https://ps.w.org/mailchimp-wp/assets/icon.svg?rev=2456715)
 * [Forms for Mailchimp by Optin Cat - Grow Your MailChimp List](https://wordpress.org/plugins/mailchimp-wp/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mailchimp-wp/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/mailchimp-wp/)
 * [Active Topics](https://wordpress.org/support/plugin/mailchimp-wp/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/mailchimp-wp/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/mailchimp-wp/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [fatcatapps](https://wordpress.org/support/users/fatcatapps/)
 * Last activity: [7 years, 10 months ago](https://wordpress.org/support/topic/list-not-set-error-api-key-not-validating/#post-10565839)
 * Status: resolved