Update contest file loading logic in app.py to handle None values

- Modified the load_contest_file function call to pass None for the 'Contest_file_helper' parameter when it is not present in the session state.
- Ensured that the contest data is processed correctly even when the helper is not provided, maintaining the integrity of the data loading process.

app.py

@@ -99,7 +99,7 @@ with tab1:
             if 'Contest_file_helper' in st.session_state:
                 st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['salary_df'], st.session_state['team_df'], st.session_state['pos_df'], st.session_state['entry_list'], check_lineups = load_contest_file(st.session_state['Contest_file'], st.session_state['Contest_file_helper'], sport_select)
             else:
-                st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['salary_df'], st.session_state['team_df'], st.session_state['pos_df'], st.session_state['entry_list'], check_lineups = load_contest_file(st.session_state['Contest_file'], sport_select)
+                st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['salary_df'], st.session_state['team_df'], st.session_state['pos_df'], st.session_state['entry_list'], check_lineups = load_contest_file(st.session_state['Contest_file'], None, sport_select)
             st.session_state['Contest'] = st.session_state['Contest'].dropna(how='all')
             st.session_state['Contest'] = st.session_state['Contest'].reset_index(drop=True)
             if st.session_state['Contest'] is not None: