Update app.py

app.py

@@ -210,13 +210,13 @@ with gr.Blocks() as demo:
 
     run_btn.click(fn=run_pipeline, inputs=[files, raw_text, dct_input], outputs=[output_table, output_logs])
 
-    def export_csv(df):
-    csv_io = io.StringIO()
-    df.to_csv(csv_io, index=False)
-    csv_io.seek(0)
-    return gr.File.update(), gr.File(value=csv_io, visible=True)
-
+      def export_csv(df):
+        csv_io = io.StringIO()
+        df.to_csv(csv_io, index=False)
+        csv_io.seek(0)
+        return gr.File(file_obj=csv_io, visible=True)
 
     download_btn.click(fn=export_csv, inputs=[output_table], outputs=csv_file_output)
 
     demo.launch()
+