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PayPal Problem - Security Header invalid

PayPal Problem - Security Header invalid

error message

Can someone tell me what is going on  with this, I think I have my PayPal module configured correctly?

 

Thanks in advance

1 REPLY

Re: PayPal Problem - Security Header invalid

This could be a couple of things. 

 

First, if you're trying to test in sandbox, make sure you're using sandbox API credentials rather than live ones. More info here: http://magento.stackexchange.com/questions/14177/paypal-express-10002-security-header-is-not-valid-e...

 

If that still doesn't work, you might need to try the steps listed as a solution in this post: http://magento.stackexchange.com/questions/14177/paypal-express-10002-security-header-is-not-valid-e...

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