Mailchimp has a new API system now and if you are running their widget on WordPress it might ask you to update. The new upate to 3.0 will ask you for an API key. Follow the steps below after you are logged into Mailchimp.
- Click your profile name to expand the Account Panel, and choose Account.
- Click the Extras drop-down menu and choose API keys.
- Copy an existing API key or click the Create A Key button.
- Name your key descriptively, so you know what application uses that key.
