Forum background is transparent

Support
5

The issue is not that the footer is white. The issue is that the page content is not large enough to fill the entire viewport.

Still, you can also fix this with CSS. Try adding these as well.

#main > div:first-child {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

#main-outlet {
  flex: 1 0 auto;
  max-width: calc(100% - 20px);
  width: $large-width;
}