This 2002 'error' isn't an error per se. It's explained in the lodestone post Regarding congestion during Endwalker's Launch. It happens because there are over 17000 waiting in the login queue for the world you are trying to log in to. The only POSSIBLE thing they could have done would have been to add new worlds/new data centers, and they couldn't because there is a shortage of components. They looked into getting more servers, they've been very transparent about it. below is the portion of the lodestone post regarding the 2002 lobby error.

"“Error 2002” may be displayed when selecting a character in the Character Selection menu. This error is displayed when the login server is experiencing high amounts of traffic or when the number of characters waiting in a login queue for a logical Data Center exceeds 17,000. This is a measure to prevent the server from crashing due to extreme traffic overloads."