Can't get it working with MediaWiki 1.34.0. Only a clickable link to the Twitter account will appear on the page.
Topic on Extension talk:TwitterTag
Sorry for the late response, this page was not on my watchlist. Yes, the extension should work with 1.34.0. The link should be converted to timeline/tweet using Twitter's widget.js library when the page is being loaded.
Possible reasons why it wouldn't work:
- JavaScript is disabled
- Incorrect parameters, such as wrong ID
- JS fails to load for some reason