Update src/interface.py

src/interface.py

@@ -61,7 +61,10 @@ def create_demo():
                 download_button = gr.Button('Download Conversation History')
             #NEW
 
+    return demo, chat_history, show_img, text_input, submit_button, uploaded_pdf, download_button, slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k
+
+
 if __name__ == '__main__':
-    demo, chatbot, show_img, text_input, submit_button, uploaded_pdf, slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k = create_demo()
+    demo, chatbot, show_img, text_input, submit_button, uploaded_pdf, download_button, slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k = create_demo()
     demo.queue()
     demo.launch()