If you encounter an error that reads “Error validating access token” when accessing Facebook Ads with Supermetrics, it means that your Facebook account has failed a security checkpoint.
Instructions
To solve this, log in to your Facebook account again from facebook.com.
If you’ve logged in and out but are still encountering the error, try deleting your browser’s cookies and cache. If the problem persists, contact Facebook’s support for help unblocking your account.