[PrestaShopException]

Property Cart->id_currency is empty
at line 915 in file classes/ObjectModel.php

910.             }
911. 
912.             $message = $this->validateField($field, $this->$field);
913.             if ($message !== true) {
914.                 if ($die) {
915.                     throw new PrestaShopException($message);
916.                 }
917.                 return $error_return ? $message : false;
918.             }
919.         }
920.