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Exception: Security header is not valid
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New Member
Posts:  
| 14 Mar 2011 03:01 PM |
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Hello, I appreciate all the help I've received so far getting my Storefront setup. I've hit a new snag and I'm hoping you can direct me.
I just got my Paypal API signature and entered it into the settings. I setup the Paypal Website Payment Pro Gateway with the API credentials and checked "Test Mode". Next I enabled Paypal Pro as a payment option for Credit Cards.
When I attempt a purchase I get the "Security header is not valid" Exception along with a Stack Trace. Let me know if it would help to post the entire Stack Trace.
We haven't setup the cart page using SSL yet, which could be the problem, but I wanted to see if you had any ideas what could cause this error.
Thanks
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Veteran Member
Posts:2956 
| 14 Mar 2011 08:46 PM |
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Yes, always feel free to post the stack trace.
"Security header is not valid" usually means the API credentials you set are incorrect or you're not authorized to run with that credential in Test mode. Note the API credentials in Test mode and production mode are different credentials! You need to register a developer account with PayPal to get the test mode API credentials. I suggest you run it in production mode and refund any transactions. There are no fees when you refund a transaction.
Thanks,
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New Member
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| 16 Mar 2011 06:24 PM |
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you were right, it was the API credentials. I had it set for test mode but had the live credentials entered. Works good now!
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