I am having the same problem,
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Facebook returned an unexpected dataset. Try to resolve this issue, update the plugin or inform the author about the problem.
[Error occured at line 597]
Your application’s access permissions could not be granted.
Some or all access permissions are missing. Please click the button Grant access rights! and authorize the plugin to post to your Facebook profile or page.
[Error occured at line 774]
Your page or profile’s access permissions could not be verified.
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please admin, help us
