Guest Posted July 22, 2009 Share Posted July 22, 2009 Hi guys I have been to Paypal and created the APIs that are required. I've also enabled Paypal Express with the os2.2 install. Sandbox is enabled. I now have a nice paypal button as a payment option however when I click on it I get the following error: Security header is not valid Can anyone help? http://www.nissan-depot.co.uk Quote Link to comment Share on other sites More sharing options...
gate714 Posted July 24, 2009 Share Posted July 24, 2009 I have the same problem Quote Link to comment Share on other sites More sharing options...
playcraft Posted July 24, 2009 Share Posted July 24, 2009 I have the same problem What are the exact steps to replicate this? I cannot seem to replicate it. Quote Link to comment Share on other sites More sharing options...
gate714 Posted July 24, 2009 Share Posted July 24, 2009 For my situation I added the Paypal Express Checkout option, entered my Paypal API data, then turned it to "true" Upon hitting the paypal button, the next page shows a red header displaying the text "Security Header is Not Valid" I have tried with the standard 1.0 paypal module and the newer one - same result. Quote Link to comment Share on other sites More sharing options...
gate714 Posted July 24, 2009 Share Posted July 24, 2009 SOLVED: Has to do with using the Live credentials vs. the Sandbox credentials. I was using live with the sandbox. Quote Link to comment Share on other sites More sharing options...
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