fix: only clear basket if the basket is a real basket

src/QUI/ERP/Order/AbstractOrder.php

@@ -344,7 +344,7 @@ protected function setDataBaseData(array $data)
         if (!empty($data['currency_data'])) {
             $currency = \json_decode($data['currency_data'], true);
 
-            if (is_string($currency)) {
+            if (\is_string($currency)) {
                 $currency = \json_decode($currency, true);
             }
 

src/QUI/ERP/Order/OrderProcess.php

@@ -716,8 +716,12 @@ protected function checkProcessing()
      */
     protected function renderFinish()
     {
+        $Basket = $this->getBasket();
+
         // clear basket
-        $this->getBasket()->clear();
+        if ($Basket instanceof Basket\Basket) {
+            $Basket->clear();
+        }
 
         $template = \dirname(__FILE__).'/Controls/OrderProcess.html';
         $Engine   = QUI::getTemplateManager()->getEngine();