Board Thread:Support Requests - Designing Your Wiki/@comment-37380939-20200719142447/@comment-168424-20200721173413

I'm guessing you don't really know how CSS works, so it may be more difficult to get this to work...

It should be... .page-Birthday_Single .WikiaPageBackground { opacity: 0.40; background: #000 url(https://vignette.wikia.nocookie.net/twicenation/images/5/53/More_%26_More_Nayeon_Profile.jpg/revision/latest?cb=20200602205938) top center fixed !important; }

You can't just randomly change stuff and leave out things (missing opening curly bracket and removed periods) and expect it to work.