Social Icons Not Visible

Hi Since the fix to reinstate the sticky header logo in the classic version, the social icons although are there in my header/footer are not visible. The settings are the same for the other co websites I maintain where the icons do show, but they are not showing on the site I’m currently working on.

All plugins on both sites are the same, so I can’t see that it is an issue with a plugin conflicting.

Any way I can get them to be ‘visible’ again please

Thanks