Update app.py

app.py

@@ -119,7 +119,7 @@ def submit_message(prompt, prompt_template, temperature, max_tokens, context_len
         })
 
     total_tokens_used_msg = f"Total tokens used: {state['total_tokens']}"
-    chat_messages = [(history[i]['content'], history[i+1]['content']) for i in range(0, len(history)-1, 2)]
+    chat_messages = str([(history[i]['content'], history[i+1]['content']) for i in range(0, len(history)-1, 2)])
 
     return '', chat_messages, total_tokens_used_msg, state