Update src/app.py

src/app.py

@@ -21,8 +21,10 @@ with demo:
     submit_button.click(pdf_chatbot.add_text, inputs=[chat_history, txt], outputs=[chat_history], queue=False).\
         success(pdf_chatbot.generate_response, inputs=[chat_history, txt, uploaded_pdf,slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k], outputs=[chat_history,txt]).\
         success(pdf_chatbot.render_file, inputs=[uploaded_pdf], outputs=[show_img])
+    
     download_button = gr.Button("Download Chat History")
-    download_button.click(fn=download_chat_history, inputs=[chat_history], outputs="file")
+    download_output = gr.outputs.File("chat_history.csv")
+    download_button.click(fn=download_chat_history, inputs=[chat_history], outputs=download_output)
 
 if __name__ == "__main__":
     demo.launch()