Fix message type conversion in newChatView component

src/frontend/src/components/newChatView/index.tsx

@@ -57,7 +57,7 @@ export default function newChatView(): JSX.Element {
           .artifacts as ChatOutputType;
         console.log(output.data.artifacts);
         const is_ai = sender === "Machine";
-        return { isSend: !is_ai, message, sender_name };
+        return { isSend: !is_ai, message: String(message), sender_name };
       });
     setChatHistory(chatMessages);
   }, [flowPool]);