Update app.py

app.py

@@ -964,7 +964,7 @@ if st.sidebar.button("Start Benchmark"):
             # Display results
             if total_successful > 0:
                 results_df = pd.DataFrame(results)
-                st.session_state.results_df = results_df
+                st.session_state['results_df'] = results_df
                 
                 # Show model rankings
                 st.subheader("Model Rankings")
@@ -973,7 +973,7 @@ if st.sidebar.button("Start Benchmark"):
                     "Average Rank": [round(r, 2) if not np.isnan(r) else 'N/A' for r in cumulative_avg_rank.values()]
                 })
                 ranking_df = ranking_df.sort_values("Average Rank", ascending=False)
-                st.dataframe(ranking_df)  # Use st.dataframe directly instead of results_placeholder
+                st.dataframe(ranking_df)  # Use st.dataframe directly instead of results_placeholder.dataframe
                 
                 # Show detailed results
                 st.subheader("Detailed Results")