Board Thread:Technical Updates/@comment-22224-20180227225203/@comment-27345308-20180228121823

Ah, I see. It's because these wikis use  instead of   parameters. This fix is simple to apply but that certainly looks like a bug you can report through Special:Contact/bug.

Edit: Hm, maybe it's not that. Twitter widgets are working for me on the last two wikis you linked even though the last one uses ...