The problem is that when you open the preview page, that white bar appears. When you edit the theme settings, it shows you that the entire background is black and the theme is selected correctly. But for some reason, that white bar still appears.
The problem is that when you open the preview page, that white bar appears. When you edit the theme settings, it shows you that the entire background is black and the theme is selected correctly. But for some reason, that white bar still appears.