Error when testing PayPal. It shows error message "Security header is not valid".

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    Asked on January 20, 2020 at 10:30 PM

    Hi, I added a Paypal pro payment method to my form. I have a current PayPal pro account. I entered the API pass and signature info, put it in to sandbox mode, then tried to test a payment and I get this error: Security header not valid (see screenshot). I've used PayPal before successfully on my other forms. What's going on? Thanks.


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    Answered on January 21, 2020 at 05:50 AM

    With which form you are having this issue with? I did check your last edited form #200197066781155 but it does not have any Paypal payment tool.

    As you have mentioned that you have enabled Sandbox mode in payment tool, please note that you need to add your PayPal sandbox account credential to test your payment form. Please click on the following URL to create sandbox account: 

    You may like to take a look at the following guide which should help you:

    Hope this helps.

    Do get back to us if you have any questions.