It is called autocomplete it is working here which is running latest so something specific to your site.
Can you try Safe mode? How to use Discourse Safe Mode
If that fails, uninstall all 3rd party plugins and try again.
It is called autocomplete it is working here which is running latest so something specific to your site.
Can you try Safe mode? How to use Discourse Safe Mode
If that fails, uninstall all 3rd party plugins and try again.