The root cause may be a broken link between the application and the plugin. Here’s how to manually reset the application <> plugin link so that the latest banner design file is pushed to the WordPress backend: 

1. Go to your Account page in Cookie Compliance app and click the 3-dot menu next to the domain name; choose the “Edit” option
2. Copy the AppID and Secret Key fields at the bottom
3. On your WordPress plugin settings page, delete the AppID and Secret Key fields, and click Save Changes.
4. Paste the AppID and Secret Key you copied from the application into the WordPress plugin settings page, and Save Changes.

This should reset your plugin, at which point you can go back to your Configuration page in the app and click “Publish Now”.