Cart changed since the last checkout express error

[Hafax]

When I make the payment with PayPal on my website with prestashop, after Checkout Payment, the page goes to a 404 error, and if I refresh I get this error:

Please try to contact the merchant:
<b>PayPal response:</b>
BILLINGAGREEMENTACCEPTEDSTATUS -> 0
CHECKOUTSTATUS -> PaymentActionCompleted
TIMESTAMP -> 2014-05-26T11:37:21Z
EMAIL -> [email protected]
PAYERID -> DMCCLG8Q5ZSX8
PAYERSTATUS -> unverified
FIRSTNAME -> Firstname Middlename
LASTNAME -> Lastname
COUNTRYCODE -> DK
SHIPTONAME -> Firstname Middlename Lastname
SHIPTOSTREET -> Adress
SHIPTOSTREET2 -> Adress
SHIPTOCITY -> City
SHIPTOZIP -> Zipcode
SHIPTOCOUNTRYCODE -> DK
SHIPTOCOUNTRYNAME -> Denmark
ADDRESSSTATUS -> Unconfirmed
CURRENCYCODE -> DKK
AMT -> 6.00
ITEMAMT -> 6.00
SHIPPINGAMT -> 0.00
HANDLINGAMT -> 0.00
TAXAMT -> 0.00
INSURANCEAMT -> 0.00
SHIPDISCAMT -> 0.00
L_NAME0 -> prøve item
L_NUMBER0 -> 29
L_QTY0 -> 1
L_TAXAMT0 -> 0.00
L_AMT0 -> 6.00
L_DESC0 -> lalala...
L_ITEMWEIGHTVALUE0 -> 0.00000
L_ITEMLENGTHVALUE0 -> 0.00000
L_ITEMWIDTHVALUE0 -> 0.00000
L_ITEMHEIGHTVALUE0 -> 0.00000
PAYMENTREQUEST_0_CURRENCYCODE -> DKK
PAYMENTREQUEST_0_AMT -> 6.00
PAYMENTREQUEST_0_ITEMAMT -> 6.00
PAYMENTREQUEST_0_SHIPPINGAMT -> 0.00
PAYMENTREQUEST_0_HANDLINGAMT -> 0.00
PAYMENTREQUEST_0_TAXAMT -> 0.00
PAYMENTREQUEST_0_INSURANCEAMT -> 0.00
PAYMENTREQUEST_0_SHIPDISCAMT -> 0.00
PAYMENTREQUEST_0_TRANSACTIONID -> 81L157049P102883X
PAYMENTREQUEST_0_INSURANCEOPTIONOFFERED -> false
PAYMENTREQUEST_0_SHIPTONAME -> Firstname Middlename Lastname
PAYMENTREQUEST_0_SHIPTOSTREET -> Adress
PAYMENTREQUEST_0_SHIPTOSTREET2 -> Adress
PAYMENTREQUEST_0_SHIPTOCITY -> City
PAYMENTREQUEST_0_SHIPTOZIP -> Zipcode
PAYMENTREQUEST_0_SHIPTOCOUNTRYCODE -> DK
PAYMENTREQUEST_0_SHIPTOCOUNTRYNAME -> Denmark
PAYMENTREQUEST_0_ADDRESSSTATUS -> Unconfirmed
PAYMENTREQUEST_0_ADDRESSNORMALIZATIONSTATUS -> None
L_PAYMENTREQUEST_0_NAME0 -> prøve item
L_PAYMENTREQUEST_0_NUMBER0 -> 29
L_PAYMENTREQUEST_0_QTY0 -> 1
L_PAYMENTREQUEST_0_TAXAMT0 -> 0.00
L_PAYMENTREQUEST_0_AMT0 -> 6.00
L_PAYMENTREQUEST_0_DESC0 -> lalala...
L_PAYMENTREQUEST_0_ITEMWEIGHTVALUE0 -> 0.00000
L_PAYMENTREQUEST_0_ITEMLENGTHVALUE0 -> 0.00000
L_PAYMENTREQUEST_0_ITEMWIDTHVALUE0 -> 0.00000
L_PAYMENTREQUEST_0_ITEMHEIGHTVALUE0 -> 0.00000
PAYMENTREQUESTINFO_0_TRANSACTIONID -> 81L157049P102883X
PAYMENTREQUESTINFO_0_ERRORCODE -> 0
Cart changed since the last checkout express, please make a new Paypal checkout payment
Your cart is empty.


Anyone have any idea how to fix this? I'm using prestashop 1.5.6.1 with the Alysum Theme

The order goes through, on Paypal, and I recieve the money correctly, so it seems to be a problem on prestashop of some sort.

[Dh42]

These ones are tough to debug. You could look at the server logs from when the cart comes back from paypal to see what happens. Also, you can set error reporting on to see the error message when the cart comes back from paypal. Does your product have an ean13 by chance?

[Hafax]

Thanks for trying to help, but I spoke with the creators of the module, and they managed to find a solution. Zip Code wasn't required on my website, but it is required by paypal, and when the module tries to get the ZipCode which is empty you get the error. So it was fixed by making ZipCode a requirement for adresses on my website.

Many thanks to 202 ecommerce.