Update app.py

app.py

@@ -354,7 +354,7 @@ class App:
                     # btn_openfolder.click(fn=lambda: self.open_folder("outputs"), inputs=None, outputs=None)
 
                     input_multi.change(fn=self.update_viewer,inputs=input_multi,outputs=[input_file_audio,input_file_video,input_file_multi])
-                    btn_download.click(fn=download_files,inputs=files_subtitles,outputs=gr.File())
+                    btn_download.click(fn=self.download_files,inputs=files_subtitles,outputs=gr.File())
                     
                 with gr.TabItem("Device info"):  # tab2
                     with gr.Column():