No matter what I try (even disabling all plugins) the Social widget doesn’t work. I’m on WP 5.5 and Replay 3.8 and I have also tried a clean install of the theme. I do get the social icons on the sidebar but nothing underneath them.
But I’m referring to the Social widget that comes with the theme. So no “iframe” or “script” is needed. You just drag it from the Widgets menu and fill in the details (ie twitter user name, etc).