diff --git a/packages/editor-ui/src/views/NodeView.vue b/packages/editor-ui/src/views/NodeView.vue
index 505ad3a149..0fccc52dc1 100644
--- a/packages/editor-ui/src/views/NodeView.vue
+++ b/packages/editor-ui/src/views/NodeView.vue
@@ -4351,7 +4351,7 @@ export default defineComponent({
 			}
 		},
 		async onPostMessageReceived(message: MessageEvent) {
-			if (!message?.data?.includes?.('"command"')) {
+			if (!message || typeof message.data !== 'string' || !message.data?.includes?.('"command"')) {
 				return;
 			}
 			try {