【Addded on August 5, 4:00 pm】The following issue was resolved around 4:00 pm. We apologize for any inconvenience caused.

As of 11:40 am on Monday, August 5, 2024, it appears that trying to log in to the Unified Authentication System using the Firefox browser results in an error and preventing successful login. 
It seems that other browsers are working, so please try using Google Chrome, Edge, or other alternatives.