PayPal blank page

[tonti-snc]

In my Prestashop 1.6.0.6 the PayPal module (at the payment) gives a blank page and, if you refresh, a page with an error message with empty error code.

All the parameters seems to be ok.

 

Anyone has solutions?

[PSfever.com]

Hi,

 

first please allow the debug mode and then copy the entire error msg that pops up..until then, there's nothing we can do.

[tonti-snc]

This the error, but it's a mistery, because we use only 1 currency and it's set.

 

Notice: Trying to get property of non-object in /var/www/clients/client1/web33/web/modules/paypal/express_checkout/process.php on line 125

Fatal error: Uncaught exception 'PrestaShopException' with message 'Property Cart->id_currency is empty' in /var/www/clients/client1/web33/web/classes/ObjectModel.php:837 Stack trace: #0 /var/www/clients/client1/web33/web/classes/ObjectModel.php(255): ObjectModelCore->validateFields() #1 /var/www/clients/client1/web33/web/classes/ObjectModel.php(596): ObjectModelCore->getFields() #2 /var/www/clients/client1/web33/web/classes/Cart.php(199): ObjectModelCore->update() #3 /var/www/clients/client1/web33/web/modules/paypal/express_checkout/process.php(126): CartCore->update() #4 /var/www/clients/client1/web33/web/modules/paypal/express_checkout/process.php(140): PaypalExpressCheckout->initParameters(true) #5 /var/www/clients/client1/web33/web/modules/paypal/express_checkout/payment.php(148): PaypalExpressCheckout->setExpressCheckout(false) #6 {main} thrown in /var/www/clients/client1/web33/web/classes/ObjectModel.php on line 837

[w3bsolutions]

You have to go to Modules > Payment, and select a currency for "PayPal" column such as "default shop currency". I don't know why but sometimes it just unselects by itself, it happens to me often.