You would need to put the widget in the Categories Siderbar section. If you don't have this section, your theme needs to be updated. see here for needed changes.
Bugs Ive found
@macfan sue who? And what bugs, why don’t you make bug reports in the GitHub.
How is who stealing from you?
This is NodeBB which is a free software, open-source software, and community powered software.
Also, you’re probably joking, but I’m sure NodeBB says somewhere in its terms of whatever that you can’t sue them. I believ it says it when you run ./NodeBB start