[PrestaShopException]

Property Cart->id_currency is empty
at line 917 in file classes/ObjectModel.php

912.             }
913. 
914.             $message = $this->validateField($field, $this->$field);
915.             if ($message !== true) {
916.                 if ($die) {
917.                     throw new PrestaShopException($message);
918.                 }
919.                 return $error_return ? $message : false;
920.             }
921.         }
922.