我收到一个奇怪的错误，我似乎无法在 Paypal 错误列表中找到它： https ://developer.paypal.com/webapps/developer/docs/classic/api/errorcodes/
这是 Magento Paypal 结帐特有的，错误日志显示：
exception 'Mage_Core_Exception' with message 'PayPal NVP gateway errors: Timeout processing request (#10001: Internal Error). Correlation ID: c93a329880ec. Version: .' in /var/www/magento/app/Mage.php:579
Stack trace:
#0 /var/www/magento/app/code/community/Paypal/Expresscheckout/Model/Api/Nvp.php(1042): Mage::exception('Mage_Core', 'PayPal NVP gate...')
#1 /var/www/magento/app/code/community/Paypal/Expresscheckout/Model/Api/Nvp.php(1003): Paypal_Expresscheckout_Model_Api_Nvp->_handleCallErrors(Array)
#2 /var/www/magento/app/code/community/Paypal/Expresscheckout/Model/Api/Nvp.php(612): Paypal_Expresscheckout_Model_Api_Nvp->call('SetExpressCheck...', Array)
#3 /var/www/magento/app/code/community/Paypal/Expresscheckout/Model/Express/Checkout.php(351): Paypal_Expresscheckout_Model_Api_Nvp->callSetExpressCheckout()
#4 /var/www/magento/app/code/community/Paypal/Expresscheckout/Controller/Express/Abstract.php(127): Paypal_Expresscheckout_Model_Express_Checkout->start('https://order...', 'https://order...')
#5 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Paypal_Expresscheckout_Controller_Express_Abstract->startAction()
#6 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('start')
#7 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#8 /var/www/magento/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#9 /var/www/magento/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#10 /var/www/magento/index.php(87): Mage::run('default', 'store')
#11 {main}
我不明白为什么它会在处理 3 秒后超时，并且当我使用 sanbox 模式进行测试时，它通过了没有任何问题，但在真正的测试中它失败了。
有任何想法吗？