PayPal error (10002): Security error – Security header is not valid

  • Stefano Monteiro

    (@stemon)


    4 years, 1 month ago

    I am replacing Paypal plugin with YITH one, just so the payment checkout can be done in the popup.

    I have copied and pasted the paypal credentials as I have on the current plugin, yet I am receiving “PayPal error (10002): Security error – Security header is not valid”.

    Looking up I found this is due to incorrect API credentials, but again I have simply copied and pasted form the current plugin that works.

    What else could it be?

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