Add debug print statement in 'Data Load' section of 'app.py' to log the count of missing values in the portfolio, aiding in data validation during file loading.

app.py

@@ -321,6 +321,7 @@ if selected_tab == 'Data Load':
                     st.session_state['export_portfolio'], st.session_state['portfolio'] = load_file(portfolio_file, site_var, type_var, sport_var, 'portfolio')
                     st.session_state['export_portfolio'] = st.session_state['export_portfolio'].dropna(how='all')
                     st.session_state['export_portfolio'] = st.session_state['export_portfolio'].reset_index(drop=True)
+                    print(st.session_state['portfolio'].isna().sum())
                     st.session_state['portfolio'] = st.session_state['portfolio'].dropna(how='all')
                     st.session_state['portfolio'] = st.session_state['portfolio'].reset_index(drop=True)
                 # Check if Stack column exists in the portfolio