Paypal Sandbox account error 10002 Security header is not valid

  • I am testing the payment through paypal with an sandbox account and it gives me the “Error PayPal (10002): Security error – Security header is not valid”, the connection data is fine because I test it with the woocommerce plugins and the test payment works; I can’t find a solution

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  • Plugin Author YITHEMES

    (@yithemes)

    Hello,
    try re-entering your API username, password and signature and make sure any spaces or extra characters are removed.
    Then check that you have set the Sandbox as environment.

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