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Error: Security header is not valid Security error


RogerM
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I have finished my Cubecart store, used the PayPal Payments Pro and Express CheckOut Plugin, added my Paypal API details, copied and it tests connecting with Paypal OK. Ive pasted the IPN URL given by CubeCart into Paypal.  The store is live and so is Paypal but if I test buying a product using the "Check out with PayPal" button I get the error code as above. I can't see where I've gone wrong or how to get rid of this error. Any suggestions gratefully received.

Thanks

Roger

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A search on these forums for security header shows the latest few issues include mistyped credentials, or using sandbox credentials in the live mode, or vice versa.

In admin, there is a Request Log. Examine any records that have to do with PayPal.

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Hi bsmither

Thanks for your reply.

Yes I saw those earlier posts too which is why I requested new API codes and copied/pasted them across so I could have no errors. Both my cart and Paypal are live. When I click on Test Endpoint within the Paypal Pro & Express plugin I get confirmation of connection hence I think I've covered the previous bases where people were finding error causes. My Cubecart URL is https://www.health-disk.com/cube/index.php

Below is the error message minus my API credentials so you can see what's happened. It must have recognised the API creds to give a response I guess.   I don't know what "ACK=Failure" means but it looks significant!

Any ideas and suggestions gratefully received.

Roger

Yesterday, 19:09

Request Sent - https://api-3t.paypal.com/nvp L_PAYMENTREQUEST_0_NAME1=Postage%3A+By_Weight&L_PAYMENTREQUEST_0_AMT1=3.00&L_PAYMENTREQUEST_0_QTY1=1&L_PAYMENTREQUEST_0_TAXAMT1=0.00&L_PAYMENTREQUEST_0_ITEMCATEGORY0=Physical&L_PAYMENTREQUEST_0_ITEMURL0=https%3A%2F%2Fhealth-disk.com%2Fcube%2Findex.php%3F_a%3Dproduct%26product_id%3D58&L_PAYMENTREQUEST_0_NUMBER0=LAN8PARJ45&L_PAYMENTREQUEST_0_ITEMWEIGHTVALUE0=0.03&L_PAYMENTREQUEST_0_ITEMWEIGHTUNIT0=Kg&L_PAYMENTREQUEST_0_NAME0=Lanyard+Strap+for+HD+Protective+Case&L_PAYMENTREQUEST_0_AMT0=1.20&L_PAYMENTREQUEST_0_QTY0=1&L_PAYMENTREQUEST_0_TAXAMT0=0.00&RETURNURL=https%3A%2F%2Fhealth-disk.com%2Fcube%2Findex.php%3F_a%3Dconfirm&CANCELURL=https%3A%2F%2Fhealth-disk.com%2Fcube%2Findex.php%3F_a%3Dconfirm%26PPWPP%3Dcancel&PAYMENTREQUEST_0_NOTIFYURL=https%3A%2F%2Fhealth-disk.com%2Fcube%2Findex.php%3F_g%3Drm%26type%3Dplugins%26cmd%3Dcall%26module%3DPayPal_Pro&PAYMENTREQUEST_0_PAYMENTACTION=Sale&PAYMENTREQUEST_0_AMT=4.20&PAYMENTREQUEST_0_SHIPPINGAMT=0&PAYMENTREQUEST_0_CURRENCYCODE=GBP&PAYMENTREQUEST_0_INVNUM=151008-010938-4760&PAYMENTREQUEST_0_MULTISHIPPING=0&ALLOWNOTE=0&LOCALECODE=en-GB&CARTBORDERCOLOR=157207&LOGOIMG=&BRANDNAME=Natural+Healing+Solutions&GIFTMESSAGEENABLE=0&GIFTRECEIPTENABLE=0&GIFTWRAPENABLE=0&BUYEREMAILOPTINENABLE=0&SURVEYENABLE=0&REQCONFIRMSHIPPING=0&TOTALTYPE=EstimatedTotal&PAYMENTREQUEST_0_TAXAMT=0.00&PAYMENTREQUEST_0_ITEMAMT=4.20&METHOD=SetExpressCheckout&VERSION=112&
 
Response received TIMESTAMP=2015%2d10%2d08T00%3a09%3a26Z&CORRELATIONID=a8b0dd19ddb37&ACK=Failure&VERSION=112&BUILD=18308778&L_ERRORCODE0=10002&L_SHORTMESSAGE0=Security%20error&L_LONGMESSAGE0=Security%20header%20is%20not%20valid&L_SEVERITYCODE0=Error
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