User blog comment:DaNASCAT/Technical Update: September 20, 2017/@comment-3218221-20170924023751/@comment-126761-20170925142912

It looks like this was just a caching issue - the article cache needed to updated to switch to the newer tabber code. I just edited and saved that page to trigger an update, and the tabber now seems to display correctly. Is it showing for you there, now?