Board Thread:Support Requests - Designing Your Wiki/@comment-45303520-20200327025309

On my wiki that has been recently created by me Human history Wiki, i am unable to edit MediaWiki:Common.css and i don't understand why is this happening to me. When i also used Special:Mypage/common.css, i don't see some templates that i made don't have CSS classes. So i am in need of help. 