GTHC-112 Can't enter the game

Hi, I want to report an issue with GTH Classic. When running the launcher, it says, "Could not connect to the update server. Please check your internet connection and try again. [E:7]"

I also tried the downloaded client (folder name: playgth-classic). The problem is "invalid username or password" when I try to enter a new username and password.

I've tried clicking the Run button on the launcher. I managed to open the in-game screen, but after I entered the username and password, I still got a " password not matched " notification.

In the log history, it says that it connected to loginserver Did I miss something?