Update ui.py

ui.py

@@ -257,8 +257,7 @@ async def chat_stream(idx, local_data, user_prompt, chat_state, ctx_num_lconv=3)
     
         yield "", ppm.build_uis(), str(ppm), gr.update(interactive=True), gr.update(interactive=True), gr.update(interactive=True)
     except Exception as e:
-        gr.Warning(e)
-        ppm.append_pong("Gemini refused to answer. This happens becase there were some safety issues in the answer.")
+        ppm.replace_pong("Gemini refused to answer. This happens becase there were some safety issues in the answer.")
         yield "", ppm.build_uis(), str(ppm), gr.update(interactive=True), gr.update(interactive=True), gr.update(interactive=True)
 
 def chat_reset(local_data, chat_state):