zen-cart order payment failed
 

We are sorry for the inconvenience. The PayPal account authentication settings are not yet set up, or the API security information is incorrect. We are unable to complete your transaction. Please notify the store owner so they can correct this problem. (10002) 10002 Restricted account - Account is restricted

check 2 places:
admin desk
admin/modules.php?set=payment
check your paypal setup:
user name
password
signature

front:
includes/modules/payment/paypalwpp.php, near line 1043
$doPayPal = new paypal_curl(array('mode' => 'nvp',
'user' => trim(MODULE_PAYMENT_PAYPALWPP_APIUSERNAME),
'pwd' => trim(MODULE_PAYMENT_PAYPALWPP_APIPASSWORD),
'signature' => trim(MODULE_PAYMENT_PAYPALWPP_APISIGNATURE),
'version' => '3.2',
'server' => MODULE_PAYMENT_PAYPALWPP_SERVER));
$doPayPal->_endpoints = array('live' => 'https://api-3t.paypal.com/nvp',
'sandbox' => 'https://api.sandbox.paypal.com/nvp');

do not use the following code:

$doPayPal = new paypal_curl(array('mode' => 'nvp',
'user' => 'xxxxxxxxxxx',
'pwd' => 'xxxxxxxxxxxxxxxx',
'signature' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxx',
'version' => '3.2',
'server' => MODULE_PAYMENT_PAYPALWPP_SERVER));