최신 업데이트 후 화면에 사각형 박스가 나타나서 포럼을 사용할 수 없습니다

[RGJ (Richard - Communiteq)]

This is likely caused by discourse-content-locker which has been in broken status for over two years now. You might want to try the guest-gate plugin which has been forked from the content-locker plugin.