why do I get “Invalid appsecret_proof provided in the API argument”

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The error is (based on my experience) almost certainly correct; it means you’re proving an invalid appsecret_proof with your API call

Assuming you’re using the standard PHP SDK without modifications, the most likely reasons for this are:

  • You configured the wrong app ID in the SDK code
  • You configured the wrong app secret in the SDK code
  • You’re trying to use an access token from the wrong / another app

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)