oliver Posted December 17, 2011 Share Posted December 17, 2011 i i activated this and had an error security header what could be the problem 0 Quote Link to comment Share on other sites More sharing options...
Administrators WHMCS John Posted December 19, 2011 Administrators Share Posted December 19, 2011 This suggests the API details entered under Setup > Payment Gateways are incorrect. Please refer to http://docs.whmcs.com/PayPal#Automated_Refunds 0 Quote Link to comment Share on other sites More sharing options...
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