Update app.py

app.py

@@ -229,7 +229,7 @@ def show_results_tab(df):
     def download_table(df):
         return df, gr.File(value=df.to_csv(index=False), visible=True)
 
-    btn.click(fn=download_table, inputs=df, outputs=[table, download_btn])
+    btn.click(fn=download_table, inputs=[df], outputs=[table, download_btn])
 
 
     with gr.Row():