INVALID_ACCESS_TOKENAuthenticationToken failed validation at Meta's auth layer.
- Why it happens
- Token is malformed, expired, or signed against a client secret that has since rotated.
- How to fix
- Reconnect to mint a fresh long-lived page token.
- How PostPeer handles it
- PostPeer stores long-lived (60-day) page tokens and refreshes them on every publish to extend their life.