Facebook Ads: Error validating access token
This means that your facebook user account has failed a security checkpoint and needs to log in at https://www.facebook.com or https://m.facebook.com to correct the issue. There are various things that can trigger this, though most have noth...
7 Dec 2020 ... A troubleshooting guide for the error: Error validating access token: The user is enrolled in a blocking, logged-in checkpoint.