Fix warning

app.py

@@ -72,6 +72,7 @@ class App:
                 btn_openfolder.click(
                     fn=lambda: self.open_folder(self.args.output_dir), inputs=None, outputs=None
                 )
+
                 btn_gen.click(self.inferencer.edit_expression,
                               inputs=params + opt_in_features_params,
                               outputs=img_out)