[Erreur] OrderStatusSolver::getLabel() must be of the type string, null given

domain/Order/OrderStatus/OrderStatusSolver.php

         $this->orderStatusDefinition = $this->loadService(OrderStatusDefinition::class);
     }
 
-    public function getLabel(string $orderStatusAlias): string
+    public function getLabel(string $orderStatusAlias = null): string
     {
         $orderStatusArray = $this->orderStatusDefinition->getOrderStatusList();