Improve error handling for contest file export feedback in app.py

- Added a try-except block to handle potential errors when displaying return messages, ensuring that the application remains stable even if an error occurs.
- This enhancement improves user experience by preventing crashes and maintaining the display of contest data.

app.py

@@ -182,8 +182,10 @@ with tab1:
                 if st.button('Send file to Database?', key='export_contest_file'):
                     return_message = export_contest_file(db, sport_select, type_var, date_select, contest_id_map[contest_name_var], st.session_state['Contest_file'])
             with message_col:
-                if return_message is not None:
+                try:
                     st.info(return_message)
+                except:
+                    pass
             st.dataframe(st.session_state['Contest'].head(100))
         
     if 'Contest_file' in st.session_state: