Update app.py

app.py

@@ -77,10 +77,10 @@ def get_response(history, query, file):
         source_texts_str = "\n\n".join(source_texts)
         for char in result["answer"]:
             history[-1][-1] += char
-            yield history, "", source_texts_str
+        return history, source_texts_str
     except Exception:
         app.chat_history.append((query, "I have no information about it. Feed me knowledge, please!"))
-        yield history, "", "I have no information about it. Feed me knowledge, please!"
+        return history, "I have no information about it. Feed me knowledge, please!"
 
 def render_file(file) -> Image.Image:
     doc = fitz.open(file.name)
@@ -118,7 +118,7 @@ with gr.Blocks() as demo:
         status_text = gr.Textbox(label="Status", value="", interactive=False)
 
     with gr.Tab("Step 4: Ask Questions"):
-        chatbot = gr.Chatbot(value=[], elem_id="chatbot")
+        chatbot = gr.Chatbot(elem_id="chatbot")
         txt = gr.Textbox(
             show_label=False,
             placeholder="Enter text and press submit",
@@ -152,7 +152,7 @@ with gr.Blocks() as demo:
         outputs=[chatbot],
         queue=False,
     ).success(
-        fn=get_response, inputs=[chatbot, txt, btn], outputs=[chatbot, txt, source_texts_output]
+        fn=get_response, inputs=[chatbot, txt, btn], outputs=[chatbot, source_texts_output]
     )
 
     refresh_btn.click(