An unknown error occurred

  • Hello

    after I setup the Instant Aricles and the button “Submit for Review” appears, I press on it and nothing happened just give me an error at the head of the page “An unknown error occurred”

    in facebook developer page I can’t add logo to an existing articles

    What I have to avoid this error although I write more than 10 posts to WP and with no errors at all

    Thank you

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