Update app.py

app.py

@@ -1091,7 +1091,7 @@ elif app_mode == "Model Training":
                 )
                 st.plotly_chart(fig_importance, use_container_width=True)
             except Exception as e:
-                st.warning((f"Could not display feature importance: {e}")
+                st.warning(f"Could not display feature importance: {e}")
 
              # Explainable AI (Placeholder)
             st.subheader("Explainable AI (XAI)")