User blog comment:DaNASCAT/Technical Update: November 28, 2016/@comment-11733175-20161129203233

By looking at the new format, I noticed the share button on Special:ChatBanList as well as it being non-functional. As there's no JS errors, I'd suggest the click handler isn't being attached due to JS not loading. Apparently, someone thought the button shouldn't load there but forgot to tell the template to do the same ;)