if not ai_name in ["jutor", "claude3", "groq"]:

app.py

@@ -1681,12 +1681,18 @@ def chat_with_ai(ai_name, password, video_id, trascript_state, key_moments, user
         error_msg = "此次對話超過上限（對話一輪10次）"
         raise gr.Error(error_msg)
 
+    if not ai_name in ["jutor", "claude3", "groq"]:
+        ai_name = "jutor"
+
     if ai_name == "jutor":
         ai_client = ""
     elif ai_name == "claude3":
         ai_client = BEDROCK_CLIENT
     elif ai_name == "groq":
         ai_client = GROQ_CLIENT
+    else:
+        ai_client = ""
+
     if isinstance(trascript_state, str):
         simple_transcript = json.loads(trascript_state)
     else: