Board Thread:Support Requests - Getting Technical/@comment-396366-20171025163602/@comment-26493471-20171025193146

I think that the background is not displaying because your wiki was founded before July 2014 and thus Common.css is loaded only for monobook skin (if you check, you'll see that with monobook it does show up). You just have to ask Staff to make it load for both skins via Special:Contact/general.