Pinging you here, as requested.
Adam already knows what the issue is, but for other people reading this:
The following page has cut off the phrase "Connect with:" that was supposed to be displayed above the social login buttons in the comments section.
Regarding the plugin for social login (OneAll Social Login), I've copied over the credentials used for the international fundraising page, which, as the developer told me, replicates the settings. Here's the international fundraising page (note the "Connect with:" above the social login buttons):
Here's what's inside the Simple Custom CSS panel of the /brazil subsite, at the moment: