Idk what happen but when i try access wp-admin from some web proxy its got 404 too. only my ip returned wp error page. I’m gonna try something for now and i’ll let u know if it work.
Actually i dont have any issues with login/access new login url. I want anyone who access http://www.mysite.com/wp-admin get redirect to 404 page, instead of error page like in the provided screenshoot above. I’ve tried the instructions u gave and it success with the new wp-admin path name (thanks for the lesson!), but still when i test http://www.mysite.com/wp-admin url it still got that error page instead of 404 page.