Update app.py

app.py

@@ -104,6 +104,6 @@ if __name__ == "__main__":
         streamlit_app()
     except Exception as exception:
         import traceback
-        st.session_state['logger'].error(f"An error occurred: {exception}")
-        st.session_state['logger'].error(traceback.format_exc())
+        st.session_state.logger.error(f"An error occurred: {exception}")
+        st.session_state.logger.error(traceback.format_exc())
         st.error(f"An error occurred: {exception}")