Paypal Error

Hi,

This error is displayed because your PayPal Account Profile is set to only accept payments from "encrypted" buttons however, your item button code is "not" encrypted. This condition interrupts the payment process and displays the error message.

To turn off this option:
1. Log in to your PayPa Account.
2. Click "Profile" tabe or "Edit Profile" link.
3. Under "Selling Preferences", select "Website Payment Preferences".
4. In the section titled "Encrypted Website Payments" select "Off".
5. Click "Save".

Encrypted buttons are not useful and are not supported by the ecommerce solutions I know. The payment amount is checked by hikashop when receiving the payment notification from paypal so even if someone try to change the amount to pay for an order, hikashop will detect it and refuse the payment.

The sandbox URL is: www.sandbox.paypal.com/cgi-bin/webscr

That's a common error paypal users face when the address entered is different from the address configured in their paypal account:
www.prestashop.com/forums/viewthread/746..._country_you_wish_to
It's not related to shipping in fact.
Try to use the same address. Alternatively, you can copy the file plugins/hikashoppayment/paypal_end.php to template/YOUR_TEMPLATE/hikashoppayment/paypal_end.php
Then, in the copied file, add the code below right after the first <?php tag:
$vars["address_override"]='0';
That will avoid the error without any hack and you will be able to update hikashop without reapplying the modification each time.

you didn't add https : // at the beginning of the sandbox URL.