--- Observer/UpdateStatusVerify.php
+++ Observer/UpdateStatusVerify.php
@@ -104,7 +104,7 @@
                 "FiloBlu\Rma\Observer: Order Status for order $incrementId cannot be updated before linked RMA is processed"
             );
 
-            $history = $order->addCommentToStatusHistory(
+            $history = $order->addStatusHistoryComment(
                 __('Order cannot change status because linked RMA is still processing')
             );
             $this->orderStatusHistoryRepository->save($history);
