Content taken from #blueborder facebook page.
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Unable to display Facebook posts
Error: Error validating access token: The session has been invalidated because the user changed their password or Facebook has changed the session for security reasons.
Type: OAuthException
Code: 190
Subcode: 460
Click here to Troubleshoot.
Type: OAuthException
Code: 190
Subcode: 460
Click here to Troubleshoot.