Social icons not displaying correctly in footer widget

Hi,

I'm trying to display social icons in a footer widget. First I set this up using the Social block, which sort of works, except the icons are tiny, and changing the size setting has no effect, even when set to "huge."

So then I tried setting it up using GB buttons. They look fine in the editor, but they're not displaying on the live site. They're clearly there - if you mouse over the location the curser changes and you can actually click the link - but they're invisible.

Here is the site URL: https://getyourspice.net

You can see the tiny Social block icons in the middle of the footer; the invisible GB buttons are directly above those.

Thanks for any insights you can provide!