I can't log in anymore
As stated on the screen, I was suddenly unable to log in. The person in charge is Koji Yamamura. He is only available through LINE, but it is no longer possible to contact him.
Scam
The following is the original recommendation
ログインできなくなった
画面の表記通り、急にログインできなくなった。担当は山村浩二氏。LINEのみで担当を承っているが、連絡は取れなくなった。